Tokai Corp. v. Easton Enterprises, Inc.

United States Court of Appeals
for the Federal Circuit
__________________________

TOKAI CORP., SCRIPTO-TOKAI, INC., AND CALICO
BRANDS, INC.,
Plaintiffs/Counterclaim Defendants- Appellants,
v.
EASTON ENTERPRISES, INC., A CALIFORNIA
CORPORATION
(DOING BUSINESS AS EASTON SALES) AND FLI, INC.,
Defendants-Cross Appellants,
AND

FUN LINE INDUSTRIES, INC. AND
EASTON ENTERPRISES, INC., A NEVADA
CORPORATION,
Counterclaimants-Appellees.
__________________________

2010-1057, -1116
__________________________

Appeals from the United States District Court for the
Central District of California in Case No. 07-CV-0883,
Judge Virginia A. Phillips.
__________________________

Decided: January 31, 2011
__________________________
TOKAI CORP v. EASTON ENTERPRISES 2

R. JOSEPH TROJAN, Trojan Law Offices, of Beverly
Hills, California, argued for plaintiffs/counterclaim defen-
dants-appellants. Of counsel was DYLAN C. DANG.

KONRAD L. TROPE, Chan Law Group LLP, of Los An-
geles, California, argued for defendants-cross appellants
and counterclaimants-appellees. On the brief were
THOMAS T. CHAN and REX HWANG.
__________________________

Before NEWMAN, LOURIE, and BRYSON, Circuit Judges.
Opinion for the court filed by Circuit Judge LOURIE.
Dissenting opinion filed by Circuit Judge NEWMAN.
LOURIE, Circuit Judge.
Tokai Corp., Scripto-Tokai, Inc., and Calico Brands,
Inc., (collectively, “Tokai”) appeal from the decision of the
United States District Court for the Central District of
California granting a motion for summary judgment of
invalidity for obviousness of U.S. Patents 5,697,775 (the
“’775 patent”); 5,897,308 (the “’308 patent”); and 6,093,017
(the “’017 patent”). Tokai Corp. v. Easton Enters. Inc., No.
5:07-cv-00883 (C.D. Cal. Oct. 27, 2009) (“SJ Order”).
Easton Enterprises, Inc. (d.b.a. Easton Sales) and Fun
Line Industries, Inc. (collectively, “Easton”) cross-appeal
from the court’s claim construction order, Tokai Corp. v.
Easton Enters. Inc., No. EDCV 07-883-VAP, 2009 WL
1582924 (C.D. Cal. June 2, 2009), and the court’s order
granting Tokai’s motion to strike Easton’s supplemental
invalidity contentions, Tokai Corp. v. Easton Enters. Inc.,
EDCV 07-00883-VAP, 2009 WL 2047845 (C.D. Cal. July 8,
2009). Because the district court correctly granted sum-
mary judgment of invalidity, we affirm. As a result, we
need not decide Easton’s cross-appeal.
3 TOKAI CORP v. EASTON ENTERPRISES

BACKGROUND
Tokai owns the asserted patents, which relate to
safety utility lighters having extended lighting rods
(useful for lighting barbecue grills, for example). The
asserted patents share a priority date of August 15,
1995. 1 The claims of the asserted patents are directed to
utility lighters with automatic child-safety mechanisms
for preventing accidental ignition. Tokai competes with
Easton in the market for safety utility lighters. Tokai
asserts that it has sold more than 100 million safety
utility lighters in the United States under one or more of
its asserted patents. SJ Order, slip op. at 37. Tokai also
contends that Easton has sold more than nine million
such lighters.
In July 2007, Tokai sued Easton in the District Court
for the Central District of California for infringing the
asserted patents. Easton counterclaimed for invalidity.
At issue are claim 1 of the ’775 patent; claims 1, 10, and
13 of the ’308 patent; and claims 1, 3, and 4 of the ’017
patent.
The parties agree that the asserted claims substan-
tially overlap. Each of the asserted independent claims
describes a “lighting rod” (i.e., a utility lighter) having a
particular “safety device.” The differences among the
asserted claims arise primarily in the safety-device por-
tion of the claim. Claim 1 of the ’775 patent exemplifies
the asserted claims:
1. A safety device in a lighting rod, which
lighting rod is provided with a rod-like top end

1 The ’775 patent was filed on August 15, 1995. The
’308 patent is a continuation-in-part of the ’775 applica-
tion. The ’017 patent is a continuation-in-part of a divi-
sion of the ’308 patent.
TOKAI CORP v. EASTON ENTERPRISES 4

portion and a main body, the rod-like top end por-
tion being provided with a jetting nozzle for jet-
ting out a gas, the main body being provided with:
i) a gas tank,
ii) a valve mechanism for opening and closing a
path, through which the gas is supplied from
the gas tank to the jetting nozzle,
iii) a piezo-electric unit for generating a discharge
voltage for lighting the gas, and
iv) an operation member, which is capable of slid-
ing, which has an operating section, and which
drives the valve mechanism and the piezo-
electric unit in order to carry out a lighting
operation, the operating section of the operat-
ing member being exposed to the exterior of
the main body,
the safety device comprising:
a) a locking member having an engagement sec-
tion, which interferes with a portion of the op-
eration member and thereby locks the lighting
operation of the operation member, said lock-
ing member being capable of moving in a di-
rection, that intersects with the direction
along which the operation member moves, and
b) an urging member, which urges said locking
member to a locking direction,
said locking member being movable to a lock re-
leasing position against the urging force of
said urging member,
wherein, with the locking member in the lock re-
leasing position, the lighting operation is car-
ried out by operating the operating section of
5 TOKAI CORP v. EASTON ENTERPRISES

the operation member, and said locking mem-
ber automatically returns to the state of the
locking as the operation member returns to its
original position.
’775 patent col.24 l.59–col.25 l.28 (emphases added). As
illustrated by the relevant portions of figures 8A and 8B
of the ’775 patent, the claimed utility lighter has a trigger
(“operation member” 120) and a safety device, which
comprises a “locking member” (125) and a spring (“urging
member” 26). To operate the lighter, the user depresses
the locking member against the force of the spring and
pulls the trigger. When the user releases the locking
member, the spring automatically returns the locking
member to its initial position, where the trigger is blocked
from inadvertent actuation.
TOKAI CORP v. EASTON ENTERPRISES 6

In June 2009, the district court issued a claim con-
struction order, after which Easton stipulated that its
accused utility lighters infringe all but one of the asserted
claims as construed by the court. 2 SJ Order, slip op. at 3.
In September 2009, Tokai moved for summary judg-
ment on Easton’s counterclaim of invalidity for obvious-
ness, and Easton filed a cross-motion for summary
judgment for obviousness of the asserted patents over four
prior art references. In opposition to Easton’s motion,
Tokai submitted expert declarations from Dr. Jones (the
“Jones declaration”) and Mr. Sung (the “Sung declara-
tion”). Easton objected to the declarations, and the dis-
trict court sustained Easton’s objection. SJ Order, slip op.
at 6–7. The district court noted that Tokai failed to
submit written reports from Jones and Sung during
expert discovery and that, as a result, Easton was denied
an opportunity to depose these witnesses on the subject
matter of their expert declarations. The court thus de-
clined to consider either declaration in resolving the
parties’ summary judgment motions.
On the issue of invalidity, the district court deter-
mined that there existed no genuine issue of material fact
as to the obviousness of the asserted claims over the four
prior art references asserted by Easton: U.S. Patents
5,326,256 (“Shike”); 5,199,865 (“Liang”); 5,090,893 (“Flo-
riot”); and 4,832,596 (“Morris”). In doing so, the court
applied the four-factor analysis for obviousness under 35
U.S.C. § 103, as set forth in Graham v. John Deere Co.,
383 U.S. 1, 17–18 (1966). First, the court found no genu-
ine issue of material fact regarding the scope and content
of the asserted prior art references. SJ Order, slip op. at
18–22. Secondly, the court found no material dispute

2 Easton did not stipulate to infringement of claim 4
of the ’017 patent.
7 TOKAI CORP v. EASTON ENTERPRISES

regarding the differences between the prior art and the
claimed invention. Id. at 23–33. The court found that,
with the exception of a single aspect of claims 10 and 13 of
the ’308 patent (discussed further infra), each element of
the asserted claims was disclosed in the asserted prior
art. Id. at 23. Third, with regard to the level of skill in
the art, the district court noted that the parties disagreed
sharply. The court determined, however, that the dispute
was immaterial, as the court’s conclusion on obviousness
was the same under either party’s asserted level of skill.
Id. at 36. Finally, the court evaluated Tokai’s alleged
objective indicia of nonobviousness. Tokai asserted that
its commercial success supported patentability, but the
court found no nexus between the sales data and the
merits of the invention beyond what was available in the
prior art. Id. at 38–39. The court also found unpersua-
sive Tokai’s asserted evidence that Easton copied the
claimed inventions. Id. at 40. Based on its analysis of the
Graham factors, the district court concluded that the
asserted claims would have been obvious to one of ordi-
nary skill in the art as of the priority date of the asserted
patents and entered final judgment on October 23, 2009.
Tokai timely appealed from the district court’s exclu-
sion of its expert declarations and from the district court’s
grant of summary judgment of invalidity of the asserted
claims. We have jurisdiction pursuant to 28 U.S.C.
§ 1295(a)(1).
DISCUSSION
A. The District Court Did Not Abuse Its Discretion by
Excluding the Expert Evidence
We review a district court’s decision to exclude evi-
dence under the law of the regional circuit. Del. Valley
Floral Grp., Inc. v. Shaw Rose Nets, LLC, 597 F.3d 1374,
1379 (Fed. Cir. 2010). The Ninth Circuit, the pertinent
TOKAI CORP v. EASTON ENTERPRISES 8

regional circuit in this case, reviews a district court’s
decision to exclude evidence on summary judgment for
abuse of discretion. Wong v. Regents of Univ. of Cal., 410
F.3d 1052, 1060 (9th Cir. 2005).
Tokai argues that the district court abused its discre-
tion by excluding the Jones and Sung declarations. With
regard to the Sung declaration, Tokai argues that the
court failed to find that Sung was exempt from the writ-
ten report requirement of Federal Rule of Civil Procedure
26(a)(2)(B). Specifically, Tokai asserts on appeal that
Rule 26(a)(2)(B) permits Sung, as an employee of Tokai, to
offer an expert declaration without an accompanying
written report. Tokai further argues that its failure to
submit written expert reports for both Jones and Sung
should be excused under Rule 37(c)(1), because Tokai was
justified in not providing written reports to rebut Easton’s
expert testimony.
In response, Easton argues that the district court did
not abuse its discretion by excluding the Jones and Sung
declarations for failure to comply with the written report
requirement of Rule 26(a)(2)(B). With respect to the Sung
declaration, Easton argues that its exclusion was not an
abuse of discretion, because there is no evidence in the
record that Sung was an employee of Tokai. Easton also
argues that the district court properly excluded the decla-
rations under Rule 37(c)(1) because Tokai was not justi-
fied in failing to submit the written reports and because
Easton was prejudiced by its inability to depose Jones and
Sung on the subject matter of their declarations. Finally,
Easton argues that the two declarations are wholly con-
clusory, and therefore their exclusion, even if an abuse of
discretion, was harmless.
Under Rule 26(a)(2)(B), the disclosure of expert testi-
mony must be accompanied by a written report prepared
9 TOKAI CORP v. EASTON ENTERPRISES

and signed by the expert witness “if the witness is one
retained or specially employed to provide expert testi-
mony in the case or one whose duties as the party’s em-
ployee regularly involve giving expert testimony.” Thus,
Rule 26(a)(2)(B) contemplates an employee-expert excep-
tion to the written report requirement for “individuals
who are employed by a party and whose duties do not
regularly involve giving expert testimony.” Torres v. City
of Los Angeles, 548 F.3d 1197, 1214 (9th Cir. 2008).
Rule 37(c)(1) “gives teeth” to the written report re-
quirement of Rule 26(a)(2)(B) by forbidding a party’s use
of improperly disclosed information at a trial, at a hear-
ing, or on a motion, unless the party’s failure to disclose is
substantially justified or harmless. Yeti By Molly Ltd. v.
Deckers Outdoor Corp., 259 F.3d 1101, 1106 (9th Cir.
2001). In reviewing the district court’s decision to exclude
the declarations, we are mindful to give “particularly wide
latitude to the district court’s discretion to issue sanctions
under Rule 37(c)(1).” Id. (“Courts have upheld the use of
the sanction even when a litigant’s entire cause of action
or defense has been precluded.”).
With respect to Rule 26(a)(2)(B), Tokai failed to intro-
duce evidence indicating that Sung qualified for the
employee-expert exception. Tokai alleges that during the
summary judgment hearing it informed the district court
of Sung’s status as a Tokai employee. The record indi-
cates otherwise. Tokai’s counsel stated only that Sung
“has personal knowledge of the[] patents-in-suit because
he has dealt with them,” and that he “was not obligated to
provide an expert report because he was one of ordinary
skill in the art.” J.A. 2255–56. These statements fail to
assert, let alone prove, that Sung was a Tokai employee
entitled to exemption from the written report requirement
of Rule 26(a)(2)(B). Moreover, even if Sung were a Tokai
employee, Tokai failed to introduce evidence indicating
TOKAI CORP v. EASTON ENTERPRISES 10

that his duties did not “regularly involve giving expert
testimony.” Rule 26(a)(2)(B). Thus, the district court did
not abuse its discretion by declining to exempt Sung from
the written report requirement of Rule 26(a)(2)(B).
Regarding Rule 37(c)(1), we agree with the district
court that Tokai’s failure to adhere to the requirements of
Rule 26(a)(2)(B) was neither harmless nor substantially
justified. Tokai does not argue that it lacked the time or
ability to prepare and submit the required written re-
ports. Before the close of expert discovery, Tokai ac-
knowledged that it was “fully prepared . . . to confront the
challenges to its patents presented by Easton’s Prelimi-
nary Invalidity Contentions,” which included all four
asserted prior art references. Pl.’s Reply to Def.’s Opp. to
Mot. to Strike Def.’s Supplemental Invalidity Contentions
and to Exclude Prior Art References Thereto at 11, Tokai
Corp. v. Easton Enters., Inc., No. 5:07-cv-00883 (C.D. Cal.
June 29, 2009), Doc. No. 64. Yet Tokai made a tactical
decision not to submit written reports from its experts.
J.A. 2255–56. Tokai contends that there was no reason to
submit the written reports, because the invalidity por-
tions of Easton’s expert report were “effectively gutted” by
the court’s exclusion of particular prior art references on
which Easton’s expert relied. Appellants’ Opening Br. at
22. This assertion has no merit, however, as Easton
relied on its expert report at summary judgment only to
establish the appropriate level of skill in the art. SJ
Order, slip op. at 6–7.
The written report requirement of Rule 26(a)(2)(A)
provided reason enough for Tokai to submit the written
reports, given that Tokai proffers no justification apart
from its own subjective beliefs. We have previously
cautioned litigants of the “pitfalls of playing fast and loose
with rules of discovery”:
11 TOKAI CORP v. EASTON ENTERPRISES

Conclusory expert reports, eleventh hour disclo-
sures, and attempts to proffer expert testimony
without compliance with Rule 26 violate both the
rules and principles of discovery, and the obliga-
tions lawyers have to the court. Exclusion and for-
feiture are appropriate consequences to avoid
repeated occurrences of such manipulation of the
litigation process.
Innogenetics, N.V. v. Abbott Labs., 512 F.3d 1363, 1376
n.4 (Fed. Cir. 2008). In addition, Tokai’s failure to submit
the required written reports prejudiced Easton by pre-
venting Easton from deposing Jones and Sung on the
subject matter of their expert testimony. We thus hold
that the district court did not abuse its discretion by
excluding the Jones and Sung declarations.
Furthermore, even assuming the district court abused
its discretion by excluding the Sung declaration, the error
was harmless, as the declaration is conclusory and does
not raise a genuine issue of material fact. See, e.g., Lock-
wood v. Am. Airlines, Inc., 107 F.3d 1565, 1571 (Fed. Cir.
1997) (affirming summary judgment of obviousness
because statements of patentee’s expert were conclusory
and thus failed to raise a genuine issue of material fact).
B. The District Court Did Not Err by Invalidating the
Asserted Claims
We review de novo a district court’s grant of summary
judgment, drawing all reasonable inferences in favor of
the nonmovant. King Pharms., Inc. v. Eon Labs, Inc., 616
F.3d 1267, 1273 (Fed. Cir. 2010) (citing Anderson v.
Liberty Lobby, Inc., 477 U.S. 242, 255 (1986)). A claimed
invention is unpatentable if the differences between it
and the prior art are such that the subject matter as a
whole would have been obvious at the time the invention
was made to a person having ordinary skill in the perti-
TOKAI CORP v. EASTON ENTERPRISES 12

nent art. 35 U.S.C. § 103(a) (2006); Graham, 383 U.S. at
13–14.
“Summary judgment is as available in patent cases as
in other areas of litigation.” Cont’l Can Co. USA, Inc. v.
Monsanto Co., 948 F.2d 1264, 1265 (Fed. Cir. 1991).
Moreover, “a district court can properly grant, as a matter
of law, a motion for summary judgment on patent invalid-
ity when the factual inquiries into obviousness present no
genuine issue of material facts.” Ryko Mfg. Co. v. Nu-
Star, Inc., 950 F.2d 714, 716 (Fed. Cir. 1991); accord
Union Carbide Corp. v. Am. Can Co., 724 F.2d 1567, 1571
(Fed. Cir. 1984); Chore-Time Equip., Inc. v. Cumberland
Corp., 713 F.2d 774, 778–79 (Fed. Cir. 1983). Whether an
invention would have been obvious at the time it was
made is a question of law, which we review de novo, based
on underlying facts, which we review for clear error.
Media Techs. Licensing, LLC v. Upper Deck Co., 596 F.3d
1334, 1337 (Fed. Cir. 2010), cert. denied 79 U.S.L.W. 3201
(Oct. 4, 2010). When the facts underlying an obviousness
determination are not in dispute, we review whether
summary judgment of invalidity is correct by applying the
law to the undisputed facts. Id.; Karsten Mfg. Co. v.
Cleveland Golf Co., 242 F.3d 1376, 1384–85 (Fed. Cir.
2001).
Tokai first argues that the court failed to impose on
Easton an enhanced burden to rebut the presumption of
validity of the asserted claims, because some of the as-
serted prior art references were considered during prose-
cution of the asserted patents. Tokai then asserts that
genuine issues of material fact remained regarding the
scope and content of the asserted prior art and the differ-
ences between the asserted claims and the prior art.
Tokai further contends that the district court erroneously
failed to credit Tokai’s asserted evidence of nonobvious-
ness, including commercial success and copying. Finally,
13 TOKAI CORP v. EASTON ENTERPRISES

Tokai argues that the district court’s legal conclusion of
obviousness was flawed, because there was no motivation
to combine the asserted prior art references and, in any
event, combining the prior art references to make the
claimed inventions would have required substantial
modification of the prior art.
In response, Easton argues that the court correctly
determined that there is no requirement on the facts of
this case for an enhanced burden to overcome the pre-
sumption of validity. Easton contends that there is no
genuine factual dispute as to the scope and content of the
prior art, and that there are no unpredictable differences
between the asserted claims and the prior art. Easton
further asserts that the district court correctly deter-
mined that the alleged objective indicia did not overcome
the showing of obviousness. As a result, Easton argues,
the court correctly granted summary judgment of obvi-
ousness on the asserted claims.
We agree with the district court that Easton did not
have an enhanced burden of overcoming the statutory
presumption of validity. Under 35 U.S.C. § 282, each
claim of a patent shall be presumed valid; an accused
infringer must prove invalidity by clear and convincing
evidence. Metabolite Labs., Inc. v. Lab. Corp. of Am.
Holdings, 370 F.3d 1354, 1365 (Fed. Cir. 2004). Easton is
correct in noting that, although the standard of proof does
not depart from that of clear and convincing evidence, a
party challenging validity shoulders an enhanced burden
if the invalidity argument relies on the same prior art
considered during examination by the U.S. Patent and
Trademark Office (“PTO”). For example, we have stated
that, “‘[w]hen no prior art other than that which was
considered by the PTO examiner is relied on by the at-
tacker, he has the added burden of overcoming the defer-
ence that is due to a qualified government agency
TOKAI CORP v. EASTON ENTERPRISES 14

presumed to have properly done its job.’” PowerOasis,
Inc. v. T-Mobile USA, Inc., 522 F.3d 1299, 1304 (Fed. Cir.
2008) (quoting Am. Hoist & Derrick Co. v. Sowa & Sons,
725 F.2d 1350, 1359 (Fed. Cir. 1984)). An added burden
of deference to the PTO is not required, however, with
respect to invalidity arguments based on evidence that
the PTO did not consider. Am. Hoist & Derrick Co., 725
F.2d at 1360. Here, as the district court found and as
Tokai itself acknowledges, not all of the asserted prior art
was considered by the PTO. SJ Order, slip op. at 12–13.
For example, Floriot, a key reference forming part of
Easton’s challenge to the validity of each of the asserted
claims, was not considered by the PTO during examina-
tion of any of the asserted patents. In addition, as noted
by the district court, the PTO did not consider certain of
the other asserted prior art references with respect to
each of the asserted patents. Id. at 10–11. Accordingly,
we agree with the district court that an added burden is
not required here.
We turn next to the factual inquiries that form the
background of any obviousness analysis under 35 U.S.C.
§ 103. Graham, 383 U.S. at 17–18. With regard to the
first Graham factor, the scope and content of the prior art,
the district court correctly found no genuine issue of
material fact. The parties do not dispute that utility
lighters without a safety device, as exemplified by Shike,
were available as of the priority date. SJ Order, slip op.
at 19. Regarding Liang, the parties agree that this refer-
ence discloses a utility lighter with a safety device, in
which the safety device must be manually reset to the
locking position after each use. Id. at 19–20. The parties
also agree that Floriot discloses a cigarette lighter with a
safety device that automatically resets after each use.
Further, as the district court found, the parties do not
materially dispute that the safety device in Floriot com-
15 TOKAI CORP v. EASTON ENTERPRISES

prises a blocking member that prevents ignition while in
the locked position, a return spring that applies constant
pressure on the blocking member to return it to its locked
position, and a safety mechanism that resets only after
the user ignites the lighter. Id. at 21–22. Finally, with
respect to Morris, the court correctly perceived no genuine
dispute that Morris teaches a cigarette lighter with a
safety device mounted on the side of the lighter; that the
lighter is operated via sequential action of the user’s
finger and thumb, first to disengage the safety device,
then to ignite the lighter; and that the safety device
automatically resets to the locking position after each use.
Id. at 22.
With regard to the second Graham factor, the differ-
ences between the asserted claims and the prior art, we
again discern no error in the district court’s analysis of
the parties’ contentions. Regarding each of the asserted
claims, the court found no dispute that utility lighters,
including utility lighters with safety devices, were known
in the prior art, as Shike and Liang demonstrate. Id. at
23. With respect to claim 1 of the ’775 patent, the court
correctly found no material dispute that Floriot teaches
each of the four essential components of the claimed
safety device: a locking member that locks the lighter by
hindering the movement of the operation member; an
urging member that pushes the locking member into the
locking position; the ability to operate the lighter by
pushing the locking member against the urging force; and
the automatic return of the locking member to the locking
position after use. Id. at 24–27.
Regarding claim 1 of the ’308 patent, we agree with
the district court that this claim is “substantially identical
to Claim 1 of the ’775 Patent,” but for the additional
limitation of an “unlocking member,” which moves the
locking member against the urging force of the urging
TOKAI CORP v. EASTON ENTERPRISES 16

member and is located opposite the operation member.
Id. at 27. Moreover, the district court found that Easton
demonstrated, and Tokai did not refute, that Morris
teaches a lighter with such an unlocking member. Id. at
28. The district court did not err by finding no material
factual dispute that Shike, Floriot, and Morris together
disclose each element of claim 1 of the ’308 patent.
Claim 10 of the ’308 patent discloses a utility lighter
comprising a safety device with a “locking element” and
an “unlocking element.” This claim is broader than claim
1 of the ’775 patent and claim 1 of the ’308 patent, in that
it requires neither an urging member nor an automatic
return of the locking element to the locking position. The
court found no dispute that Floriot discloses a locking
element and that Morris discloses an unlocking element
as recited in claim 10 of the ’308 patent. Id. at 30. As the
district court correctly found, the only difference between
claim 10 and the asserted prior art is the intended posi-
tion of the hand while operating the lighter: in claim 10,
the thumb engages the unlocking element and a finger
engages the operation member; in Morris, the intended
positions of the finger and thumb are reversed. Id. Claim
13, which depends from claim 10, adds an “urging means”
limitation, which, as the court discussed in connection
with claim 1 of the ’775 patent and claim 1 of the ’308
patent, Floriot discloses. Id. at 30–31.
Claim 1 of the ’017 patent claims a utility lighter with
a safety device comprising a “locking means,” which is
rotatable between a locking position and a lock-release
position, and an “urging means,” which urges the locking
means toward the locking position. Tokai does not dis-
pute on appeal the district court’s holding that “locking
means” corresponds to “[t]he combination of the locking
member and the portion of the lighter case on which the
locking member is mounted.” Tokai Corp., 2009 WL
17 TOKAI CORP v. EASTON ENTERPRISES

1582924, at *7. We agree with the district court that
Floriot discloses a rotatable locking means as claimed,
and that Floriot further discloses an urging means, as the
court discussed in connection with the ’775 and ’308
patents. SJ Order, slip op. at 31–32.
Claims 3 and 4 of the ’017 patent are dependent upon
claim 1. Claim 3 adds the requirement that the lighting
operation can be repeated so long as the locking member
is held in the lock-releasing position. The district court
correctly found no dispute that Floriot is capable of such
repeated lighting. Id. at 32. Claim 4 adds the limitation
that the locking means has a “locking section,” which
prevents the lighting operation by engaging with the
operation member while in the locking position, and
which permits the lighting operation while in the lock-
release position by disengaging from the operation mem-
ber. The district court found, and we agree, that Floriot
discloses a blocking member that meets this “locking
section” limitation. Id. at 33.
In sum, viewing all facts and reasonable inferences in
the light most favorable to Tokai, we do not discern any
error in the district court’s analysis of the second Graham
factor, the differences between the prior art and the
asserted claims. The district court correctly found no
dispute that the asserted prior art discloses each element
of claim 1 of the ’775 patent, claim 1 of the ’308 patent,
and claims 1, 3, and 4 of the ’017 patent. The court also
correctly found that the only difference between the
asserted prior art and claims 10 and 13 of the ’308 patent
is the intended position of the thumb and finger for oper-
ating the lighter.
Although at the district court the parties disputed the
third Graham factor, the appropriate level of skill in the
art, neither party on appeal contends that the court erred
TOKAI CORP v. EASTON ENTERPRISES 18

by assuming, without deciding, that the level of skill in
the art was “an individual showing aptitude in high
school shop class, or someone who builds, takes apart, or
repairs basic mechanical toys/devices.” SJ Order, slip op.
at 34. We, too, discern no error in the district court’s
assumption. The standard adopted by the district court
was the less sophisticated of the two asserted standards.
Id. at 36. Since the district court found that the asserted
claims would have been obvious to a less sophisticated
artisan, then under the facts of this case the court could
not have arrived at a different conclusion by adopting the
viewpoint of one with greater skill and experience. Ac-
cordingly, the parties’ disagreement at the district court
as to the appropriate level of skill in the art did not create
a genuine issue of material fact precluding summary
judgment.
With regard to the final Graham factor, secondary in-
dicia of nonobviousness, the district court considered
Tokai’s evidence of commercial success and copying. Id.
at 37–40. Regarding commercial success, this factor “may
have relevancy” to the overall obviousness determination,
Graham, 383 U.S. at 18, but a nexus must exist between
the commercial success and the claimed invention. Ormco
Corp. v. Align Tech., Inc., 463 F.3d 1299, 1311–12 (Fed.
Cir. 2006) (“Evidence of commercial success . . . is only
significant if there is a nexus between the claimed inven-
tion and the commercial success.”). If commercial success
is due to an element in the prior art, no nexus exists. Id.
at 1312; see also Richdel, Inc. v. Sunspool Corp., 714 F.2d
1573, 1580 (Fed. Cir. 1983) (holding claimed invention
obvious where patent holder “failed to show that such
commercial success . . . was due to anything disclosed in
the patent in suit which was not readily available in the
prior art”).
19 TOKAI CORP v. EASTON ENTERPRISES

Here, Tokai conceded that utility lighters, including
child-safe utility lighters, were available in the prior art,
SJ Order, slip op. at 38, and acknowledged that all utility
lighters currently sold are required to have a safety
device. J.A. 2045. In discussing the marketing and sales
of Tokai’s utility lighters, Tokai’s corporate representative
not once referred to the automatic locking feature of
Tokai’s lighters—i.e., the feature that purportedly distin-
guishes the claimed inventions from prior art utility
lighters. The district court thus held that because Tokai
failed to establish a nexus between the automatic safety
feature and the alleged commercial success, Tokai’s sales
data were not pertinent to the court’s obviousness deter-
mination.
We agree with the district court with respect to the fi-
nal Graham factor. Tokai proffered no evidence from
which one could reasonably infer a nexus between its
sales data and its utility lighters’ automatic-locking
features. SJ Order, slip op. at 38–39; see also Cable Elec.
Prods., Inc. v. Genmark, Inc., 770 F.2d 1015, 1027 (Fed.
Cir. 1985) (holding on summary judgment that even
though commercial success could be deduced, it deserved
no weight because a nexus was not established), overruled
on other grounds by Midwest Indus., Inc. v. Karavan
Trailers, Inc., 175 F.3d 1356 (Fed. Cir. 1999) (en banc).
However, even assuming the existence of a nexus, we see
no error in the district court’s determination that Tokai
failed to establish “that any of these secondary factors are
significant,” SJ Order, slip op. at 37, in light of the strong
showing of prima facie obviousness, as discussed infra.
See Media Tech. Licensing, 596 F.3d at 1339 (“Even if [the
patentee] could establish the required nexus, a highly
successful product alone would not overcome the strong
showing of obviousness.”); Ryko Mfg. Co., 950 F.2d at 719
(holding on summary judgment that the claimed inven-
TOKAI CORP v. EASTON ENTERPRISES 20

tion was obvious, despite “assum[ing] that a nexus ex-
isted,” because “secondary considerations did not carry
sufficient weight to override a determination of obvious-
ness based on primary considerations”).
We further agree with the district court that Tokai’s
asserted evidence of copying, viz., Easton’s stipulation of
infringement, is unpersuasive. See Ecolochem, Inc. v. S.
Cal. Edison Co., 227 F.3d 1361, 1380 (Fed. Cir. 2000)
(noting that “a showing of copying is only equivocal evi-
dence of non-obviousness in the absence of more compel-
ling objective indicia of other secondary considerations”).
Copying “requires evidence of efforts to replicate a specific
product.” Wyers v. Master Lock Co., 616 F.3d 1231, 1246
(Fed. Cir. 2010). A stipulation of infringement, taken
alone, is not probative of copying. See, e.g., Iron Grip
Barbell Co., Inc. v. USA Sports, Inc., 392 F.3d 1317, 1325
(Fed. Cir. 2004).
From the foundation established by the aforemen-
tioned factual inquiries, we must determine whether the
district court legally erred by invalidating the asserted
claims for obviousness. In KSR, the Supreme Court
stated that, in situations where “the content of the prior
art, the scope of the patent claim, and the level of ordi-
nary skill in the art are not in material dispute, and the
obviousness of the claim is apparent in light of these
factors, summary judgment is appropriate.” KSR Int’l Co.
v. Teleflex Inc., 550 U.S. 398, 427 (2007). Such is the case
here.
The district court correctly found no material factual
dispute as to each of the Graham factors. By Tokai’s own
admission, the components required to assemble the
claimed inventions are “simple mechanical parts that are
well known in the art.” Appellants’ Opening Br. at 54.
While that in itself does not render the claims obvious,
21 TOKAI CORP v. EASTON ENTERPRISES

KSR Int’l Co., 550 U.S. at 418, it is also undisputed that a
need for safer utility lighters was recognized in the art as
of the priority date. E.g., ’775 patent col.1 ll.20–25 (noting
that “a need exists for a lighting rod having enhanced
safety characteristics” and that, “[t]o satisfy such a need,
lighting rods provided with various safety devices have
been proposed” in the prior art); Appellants’ Combined
Reply & Response Br. at 16 (“The district court correctly
noted that the [asserted patents] identify a need for child-
resistant utility lighters. . . . To be sure, the problem in
the art was how to make lighters more safe . . . .”). Fur-
thermore, the parties agree that cigarette lighters and
utility lighters are analogous arts. One of ordinary skill
would thus be directed to the claimed safety utility light-
ers by combining available utility lighters with prior art
automatic locking mechanisms on cigarette lighters. We
have consistently stated that courts “may find a motiva-
tion to combine prior art references in the nature of the
problem to be solved,” and that “[t]his form of motivation
to combine evidence is particularly relevant with simpler
mechanical technologies.” Ruiz v. A.B. Chance Co., 357
F.3d 1270, 1276 (Fed. Cir. 2004); see also Rothman v.
Target Corp., 556 F.3d 1310, 1319 (Fed. Cir. 2009); Pro-
Mold & Tool Co. v. Great Lakes Plastics, Inc., 75 F.3d
1568, 1573 (Fed. Cir. 1996).
Accordingly, the undisputed facts in this case—
including the state of the prior art, the simplicity and
availability of the components making up the claimed
invention, and an explicit need in the prior art for safer
utility lighters—compel a conclusion of obviousness as to
the subject matter of each of the asserted claims. KSR
Int’l Co., 550 U.S. at 419–20 (“One of the ways in which a
patent’s subject matter can be proved obvious is by noting
that there existed at the time of invention a known prob-
lem for which there was an obvious solution encompassed
TOKAI CORP v. EASTON ENTERPRISES 22

by the patent’s claims.”). A strong case of prima facie
obviousness, such as that presented here, cannot be
overcome by a far weaker showing of objective indicia of
nonobviousness. See Media Tech. Licensing, 596 F.3d at
1339; Ryko Mfg. Co., 950 F.2d at 719.
Although a need in the prior art for safer utility light-
ers is not disputed, Tokai contends that the solutions to
this problem were “not at all predictable” and required
“radical modification” of the asserted prior art. We reject
these arguments. One of ordinary skill in the art would
not have viewed the subject matter of the asserted claims
as unpredictable. As the Supreme Court recognized in
KSR, the nature of the mechanical arts is such that
“identified, predictable solutions” to known problems may
be within the technical grasp of a skilled artisan. 550
U.S. at 421; see also Rothman, 556 F.3d at 1319 (stating
that, in the predictable arts, a claimed invention may be
invalidated more readily by showing “a motivation to
combine known elements to yield a predictable result”).
Moreover, it is undisputed that cigarette lighters and
utility lighters are analogous arts and that a need for
enhanced safety devices had been met in the field of
cigarette lighters, as demonstrated by Floriot and Morris.
It would have been obvious to one of ordinary skill and
creativity to adapt the safety mechanisms of the prior art
cigarette lighters, as disclosed in Floriot and/or Morris, to
fit a utility lighter as disclosed by Shike, even if it re-
quired some variation in the selection or arrangement of
particular components. KSR Int’l Co., 550 U.S. at 417
(“When a work is available in one field of endeavor, design
incentives and other market forces can prompt variations
of it, either in the same field or a different one.”).
In light of the foregoing, we hold that the asserted
claims are invalid as obvious. Specifically, with regard to
claim 1 of the ’775 patent, the court did not err by holding
23 TOKAI CORP v. EASTON ENTERPRISES

on summary judgment that the claimed subject matter as
a whole would have been obvious over Shike and Floriot.
Each of the components making up the claimed subject
matter existed in the prior art, including the utility
lighter, the locking member, the urging member, the
ability to move the locking member in a direction opposite
the urging force, and the automatic return of the locking
member to the locking position following ignition. There
was a recognized need in the prior art for safer utility
lighters that would have provided one of ordinary skill
with a definite reason for modifying the prior art utility
lighters exemplified by Shike and Liang. One of ordinary
skill would thus have been motivated to adapt these
utility lighters to incorporate the automatic safety devices
available in the art, as exemplified by Floriot and Morris.
Similarly, the court did not err by holding that the
subject matter of claims 1, 10, and 13 of the ’308 patent
would have been obvious over Shike, Floriot, and Morris.
The ’308 patent addresses the same problem as the ’775
patent. ’308 patent col.1 ll.23–29. In addition to the
elements of claim 1 of the ’775 patent, an unlocking
member is required by claim 1 of the ’308 patent. Morris
indisputably discloses this element, and Morris, like
Shike and Floriot, is analogous art available to the skilled
artisan. It therefore would have been obvious for one of
ordinary skill to combine the required elements from the
asserted prior art to arrive at the subject matter of claim
1 of the ’308 patent. The required elements of claim 10 of
the ’308 patent include a utility lighter, an example of
which is disclosed by Shike; a locking element, an exam-
ple of which is disclosed by Floriot; and an unlocking
element, an example of which is disclosed by Morris. The
only missing claim limitation—the intended position of
the finger and thumb when using the lighter—is nothing
more than a predictable variation on the prior art. KSR
TOKAI CORP v. EASTON ENTERPRISES 24

Int’l Co., 550 U.S. at 417. In both the claimed invention
and in Morris, the lighter is operated via sequential
action of the finger and thumb; a mere reversal in the
order of these actions does not confer patentability. Claim
13 of the ’308 patent, which is dependent upon claim 10,
adds the requirement of an urging means, as Floriot
discloses. We discern no error in the district court’s
conclusion that claims 1, 10, and 13 of the ’308 patent are
invalid as obvious.
Finally, regarding the ’017 patent, the district court
did not err by holding the subject matter of claims 1, 3,
and 4 obvious over Shike and Floriot. As with the ’775
patent, each of the elements was found in analogous prior
art, including, for claim 1, a utility lighter, a locking
means, and an urging means; for claim 3, the added
limitation of repeatability of the lighting operation; and
for claim 4, the added limitation of a locking section that
operates in the specified manner. One of ordinary skill
would have had the motivation and capability of adapting
and assembling these prior art components into the
subject matter of the asserted claims.
CONCLUSION
For the foregoing reasons, the district court did not
abuse its discretion by excluding the expert reports and
did not legally err by determining that the asserted
claims are invalid.
AFFIRMED
COSTS
Costs to Easton.
 United States Court of Appeals
for the Federal Circuit
__________________________

TOKAI CORP., SCRIPTO-TOKAI, INC., AND CALICO
BRANDS, INC.,
Plaintiffs/Counterclaim Defendants-Appellants,

v.
EASTON ENTERPRISES, INC., A CALIFORNIA
CORPORATION
(DOING BUSINESS AS EASTON SALES) AND FLI, INC.,
Defendants-Cross Appellants,

and
FUN LINE INDUSTRIES, INC. AND
EASTON ENTERPRISES, INC., A NEVADA
CORPORATION.
Counterclaimants-Appellees.
__________________________

2010-1057,-1116
__________________________

Appeal from the United States District Court for the
Central District of California in Case No. 07-CV-0883,
Judge Virginia A. Phillips.
__________________________

NEWMAN, Circuit Judge, dissenting.
TOKAI CORP v. EASTON ENTERPRISES 2

The invention patented by Tokai Corporation is a utility
rod lighter of the sort used to light barbeques or fireplaces,
having a novel safety mechanism that achieves a new level
of child-safety over the prior art. The Tokai lighter dis-
placed previously available child-safety rod utility lighters,
and received the ultimate accolade of copying by the compe-
tition.

The Tokai lighter has an ingenious safety design,
whereby the device is simple to operate by adults but not by
children, unlike prior art utility lighters, and locks auto-
matically after use, unlike prior art utility lighters. The
Tokai safety structure does not result from direct combina-
tion of the prior art. Nonetheless the district court, and now
this court, hold on summary judgment that the asserted
claims of the Tokai patents are invalid for obviousness. I
must, respectfully, dissent.

I

The basic structure of a utility rod lighter is illustrated
in a patent to Shike, cited by the district court as prior art
to Tokai’s claimed lighter.

Fig. 1
3 TOKAI CORP v. EASTON ENTERPRISES

U.S. Patent 5,326,256 (“Shike”). Shike shows the typical
extended rod for lighting the charcoal or other fuel, and a
trigger (18) operated mechanism that causes a piezoelectric
unit (20) to discharge voltage that ignites combustible gas
released from a gas reservoir (7). Shike Patent, col 3. II. 5-
15. Although Shike does not have a safety mechanism,
utility rod lighters are currently required to have safety
features to prevent accidental or uncontrolled ignition,
particularly by children.

The typical safety features in utility lighters operate in
three steps: first, the user releases a locking mechanism;
then the lighter is used, generally by a trigger-initiated
ignition mechanism; then the lighter is relocked. For exam-
ple, the cited prior art patent to Liang shows a utility
lighter with a safety mechanism that is manually controlled:

Fig. 1

U.S. Patent 5,199,865 (“Liang”). As the district court ex-
plained, Liang teaches a utility rod lighter with a control
knob safety mechanism (3) that “must be manually set to a
locking position or operational position, and will not auto-
matically return to a locking position after use.” Tokai Corp.
v. Easton Enters. Inc., No. 5:07-cv-00883 (C.D. Cal. Oct. 27,
2009) (“SJ Order”), slip op. at 20.
TOKAI CORP v. EASTON ENTERPRISES 4

In contrast, Tokai’s device provides two aspects of child-
proof safety: first, the device is not operable by a child’s
hand, and second, it locks automatically after use. The
Tokai device requires an adult hand for concurrent two-
finger operation, whereby the locking member is unlocked
by the adult thumb while the trigger is simultaneously
operated by the adult index finger; these steps must be
concurrent, not sequential. After release the mechanism
automatically returns to the locked position. The simplicity,
the ease of operation, the child-proof effectiveness, and the
safety of this design displaced the competition. The record
states that Tokai has sold more than 100 million of these
utility lighters in the United States; Tokai’s Vice President
testified that large retailers such as Wal-Mart told him that
they were purchasing Tokai’s lighters because of the im-
proved child safety “as it relates to our mechanism versus
the competition.”

Tokai asserted Claim 1 of the 5,697,775 (the “’775 pat-
ent”); Claims 1, 10 and 13 of the 5,897,308 (the “’308 pat-
ent”); and Claims 1, 3, and 4 of the 6,093,017 (the “’017
patent”), all inventions of Saito et al. On summary judg-
ment the district court held all of the asserted claims invalid
for obviousness. I cannot agree.

The Tokai '308 patent utility lighter safety feature is il-
lustrated in the patent as follows:
5 TOKAI CORP v. EASTON ENTERPRISES

U.S. Patent 5,897,308 (“Saito”). As shown by the arrow in
Figure 8A, when the user’s thumb depresses the lock-
releasing button (125c) of the locking member (125), the
engagement section of the locking member (125b) moves
from the engagement groove (120f) into the operation mem-
ber or trigger (120), and the shaft (125a) slides along the
vertical groove (120e) of the operation member, so that it
becomes possible for the trigger to be pulled simultaneously
with depression of the lock-releasing button. Id. col.16 ll.18-
31. After the trigger is pulled and ignition is achieved, on
release of the device the spring (26) automatically returns
the locking member to the locked position whereby the
trigger cannot be pulled. Id. col.16 ll.31-33. Claim 10 is
directed to the device and its thumb and finger operation:
TOKAI CORP v. EASTON ENTERPRISES 6

10. A safety device in a lighting rod, which light-
ing rod is provided with a rod-like top end portion
and a main body, the rod-like top end portion being
provided with a jetting nozzle for jetting out a gas,
the main body being provided with:
i) a gas tank,
ii) a valve mechanism for opening and clos-
ing a path, through which the gas is
supplied from the gas tank to the jetting
nozzle,
iii) a piezoelectric unit for generating a dis-
charge voltage for lighting the gas, and
iv) an operation member, which is capable
of sliding, which has an operating sec-
tion, and which drives the valve mecha-
nism and the piezoelectric unit in order
to carry out a lighting operation, the op-
erating section of the operating member
being exposed to the exterior of the
main body in a position to be capable of
operational engagement by a finger of a
hand holding the lighting rod,
the safety device comprising:
a) a locking element which is disposed in-
side the main body to be movable be-
tween a locking position where it
prevents motion of the operation mem-
ber in a direction to produce the lighting
operation and a lock release position
where it allows motion of the operation
member in a direction to permit the
lighting operation, and
b) an unlocking element which is exposed
to the exterior of the main body at a lo-
cation opposite from the operation mem-
ber so as to be engagable by the thumb
7 TOKAI CORP v. EASTON ENTERPRISES

of the hand holding the lighting rod to
move the locking element from the lock-
ing position to the unlocking position
while a finger of that hand engages the
operation section.
Id. col.33 l.44-col.34 l.28 (emphases added). Claim 13 adds
the automatic locking limitation that the unlocking element
is normally urged away from the lock release position by
“urging means.” Id. col.34 ll.43-47.

The district court held all of the claims invalid for obvi-
ousness, based on the combination of the Shike utility
lighter, supra, which has no safety feature, with the safety
features of a cigarette lighter patent to Morris, and/or a
cigarette lighter patent to Floriot. However, these features,
if combined, do not produce the Saito device. The Morris
cigarette lighter is as follows:

Fig. 1

U.S. Patent 4,832,596 (“Morris”). The Morris safety feature
consists of a stop member (9) with an inturned wedge por-
TOKAI CORP v. EASTON ENTERPRISES 8

tion (12) which, when in the locked position, prevents actua-
tion of the lever (4a) which controls the opening of the
lighter’s gas valve. The user grasps the lighter in such a
manner that the index finger presses at (16), thereby sliding
the wedge portion (12) outwardly from underneath the lever
(4a), and releasing the gas valve, whereby the gas is ignited
by striking the flint wheel. Id. at col.3 ll.5-15. This patent
was cited during examination, the PTO recognizing the
differences in mechanism and operation from the Saito
device.

The Floriot lighter also blocks the opening of a gas valve
in a flint and wheel cigarette lighter, illustrated as follows:
9 TOKAI CORP v. EASTON ENTERPRISES

Fig. 9

U.S. Patent 5,090,893 (“Floriot”). The Floriot lighter safety
mechanism has a rocking lever (15), shown at the top of
Figure 9, that controls the opening of a burner valve, and a
blocking lever (24, 24a), shown at the bottom of Figure 6,
that blocks the operation of the rocking lever. In operating
the Floriot lighter, first the blocking lever is moved to an
unblocking position by the thumb, in which position the
blocking lever is held by a projection. The thumb then
operates the unblocked cigarette lighter using the flint
wheel. These are sequential actions, and do not require
two-finger coordination. The blocking lever returns to the
locked position automatically after operation of the cigarette
lighter. Id. col.8 ll.13-30.

The district court held that it would have been obvious
to a person of ordinary skill, defined for summary judgment
purposes as a person with aptitude for high school shop
class, to combine the various elements of the prior art to
create the Saito device. However, the Saito device is not a
TOKAI CORP v. EASTON ENTERPRISES 10

simple insertion of the Floriot or Morris cigarette lighter
safety mechanism into a utility lighter, as in the combina-
tion of known structures exemplified in KSR International
Co. v. Teleflex, Inc., 550 U.S. 398 (2007). Where, as here,
the features of one reference cannot be substituted into the
structure of a second reference, this weighs against obvi-
ousness. See Orthopedic Equip. Co. v. United States, 702
F.2d 1005, 1013 (Fed. Cir. 1983) (“The fact that features of
one reference cannot be substituted into the structure of a
second reference may indicate that the claims were nonob-
vious in view of the combined teachings of the two refer-
ences.”).

Both Morris and Shike were cited in the ’775 patent,
and the specification of the ’308 patent recognizes that “the
aforesaid safety mechanisms for gas lighters cannot be
directly applied to a lighting rod, which has a different
structure.” ’308 Patent, col.1 l.52, col.2 ll.1-3. Floriot is
cumulative to Morris, in offering a different safety mecha-
nism for a cigarette lighter. “When an attacker simply goes
over the same ground travelled by the PTO, part of the
burden is to show that the PTO was wrong in its decision to
grant the patent.” Am. Hoist & Derrick Co. v. Sowa & Sons,
Inc., 725 F.2d 1350, 1360 (Fed. Cir. 1984). Defendants have
not met this burden.

The district court applied an incorrect standard. The
determination of obviousness is not whether a person could,
with full knowledge of the patented device, reproduce it
from prior art or known principles. The question is whether
it would have been obvious, without knowledge of the pat-
entee’s achievement, to produce the same thing that the
patentee produced. This judgment must be made without
the benefit of hindsight. It is improper to take concepts
from other devices and change them in light of the now-
11 TOKAI CORP v. EASTON ENTERPRISES

known template of the patented device, without some direc-
tion in the prior art that would render it obvious to do so.

In a crowded and competitive field such as this is stated
to be, a modification that achieves a valuable improvement
is of significance in view of the many entrants seeking
commercial advantage. See In re Hummer, 241 F.2d 742,
744 (C.C.P.A. 1957) (“applicant seeks a patent on only a
narrow improvement. Progress is as important, however, in
crowded arts as well as in those which are in the pioneer
stage”). As the Hummer court recognized, incremental but
unobvious improvements serve the public interest, and are
included in the purpose of the patent incentive.

The obviousness determination often presents a close
question, as recognized by Judge Learned Hand: “Courts
never tire, or at least in earlier times they never did, of
expatiating upon the freshness of insight which observes a
little, but fruitful, change which had theretofore escaped
detection by those engaged in the field.” Harries v. Air King
Products Co., 183 F.2d 158, 162 (2d Cir. 1950). Precedent
guides the decision-maker to take cognizance of the re-
sponse of the marketplace to the invention. See Arkie Lures,
Inc. v. Gene Larew Tackle, Inc., 119 F.3d 953, 957 (Fed. Cir.
1997) (“The so-called ‘secondary considerations’ provide
evidence of how the patented device is viewed by the inter-
ested public: not the inventor, but persons concerned with
the product in the objective arena of the marketplace. . . .
Such aspects may be highly probative of the issue of nonob-
viousness.”) (citing Stratoflex, Inc. v. Aeroquip Corp., 713
F.2d 1530, 1538-39 (Fed. Cir. 1983)). The Court reiterated
in KSR that “[s]uch secondary considerations as commercial
success, long felt but unsolved needs, failure of others, etc.,
might be utilized to give light to the circumstances sur-
rounding the origin of the subject matter sought to be pat-
ented.” 550 U.S. at 406 (quoting Graham v. John Deere Co.
TOKAI CORP v. EASTON ENTERPRISES 12

of Kansas City, 383 U.S. 1, 17-18 (1966)); see also Ashland
Oil, Inc. v. Delta Resins & Refractories, Inc., 776 F.2d 281,
306 (Fed. Cir. 1985) (“Secondary considerations may be the
most pertinent, probative, and revealing evidence available
to the decision maker in reaching a conclusion on the obvi-
ousness/nonobviousness issue.”).

Although the district court recognized the commercial
success of the Saito utility lighter, the court declined to give
it any weight, finding, on summary judgment, that there
was no “nexus” between the Saito invention and its com-
mercial success. SJ Order, slip op. at 38. The court erred in
law, for “a prima facie case of nexus is generally made out
when the patentee shows both that there is commercial
success, and that the thing (product or method) that is
commercially successful is the invention disclosed and
claimed in the patent.” Demaco Corp. v. F. Von Langsdorff
Licensing Ltd., 851 F.2d 1387, 1392 (Fed. Cir. 1988). The
defendants did not dispute Tokai’s evidence that its com-
mercial success was due to its improved child-safety mecha-
nism. It was improper for the district court to ignore the
principle stated in Demaco and then resolve this material
factual aspect against Tokai on summary judgment. See
Pro-Mold & Tool Co. v. Great Lakes Plastics, Inc., 75 F.3d
1568, 1574 (Fed. Cir. 1996) (vacating summary judgment of
invalidity for obviousness, on the ground that a genuine
issue of material fact existed as to whether a commercial
success nexus was present).

The district court found that “copying is inarguably pre-
sent here,” but stated that it gave no weight to this finding,
reasoning that copying is “only equivocal evidence of non-
obviousness.” SJ Order, slip op. at 39-40. 1 While it is the

1 Despite the district court’s recognition that Tokai
had demonstrated copying, my colleagues find Tokai’s
13 TOKAI CORP v. EASTON ENTERPRISES

province of the district court to determine the weight to be
given to evidence of commercial success and copying, such
evidence cannot be completely ignored. See Stratoflex, 713
F.2d at 1538 (“[E]vidence rising out of the so-called ‘secon-
dary considerations’ must always when present be consid-
ered en route to a determination of obviousness. Indeed,
evidence of secondary considerations may often be the most
probative and cogent evidence in the record. It may often
establish that an invention appearing to have been obvious
in light of the prior art was not.”) (citations omitted); W.L.
Gore & Assocs., Inc. v. Garlock, Inc., 721 F.2d 1540, 1555
(Fed. Cir. 1983) (“objective evidence of nonobviousness . . .
should when present always be considered as an integral
part of the analysis”).

Tokai’s evidence of commercial success and copying of
the patented device, taken with the structural differences
and the differences in operation between the prior cigarette
lighter safety mechanisms and the Saito utility lighter
safety mechanism, as well as the differences between the
auto-locking Saito mechanism and manual locking prior
utility lighters, created at least genuine issues of material
fact bearing on obviousness. Summary judgment was
improperly assessed by the district court, and is now incor-
rectly affirmed by this court. See Matsushita Elec. Indus.
Co. v. Zenith Radio Corp., 475 U.S. 574, 587 (1986) (on

evidence of copying “unpersuasive,” stating that copying
“requires evidence of efforts to replicate a specific product.”
Maj. Op. at 20. Defendants’ internal documentation of its
unsuccessful attempts to design around the Saito invention
is such evidence. J.A. 1451-1457. The court improperly
resolves this factual aspect against Tokai on summary
judgment. See Anderson v. Liberty Lobby, Inc., 477 U.S.
242, 255 (1986) (on motion for summary judgment “the
evidence of the nonmovant is to be believed, and all justifi-
able inferences are to be drawn in his favor”).
TOKAI CORP v. EASTON ENTERPRISES 14

motion for summary judgment the court must view the facts
in the light most favorable to the non-moving party and give
it the benefit of all reasonable inferences to be drawn from
those facts).

My colleagues depart from the law governing determi-
nation of obviousness. The disputed facts cannot be ad-
versely found on summary judgment. The question at least
requires trial.

II

Procedural error appears to have disadvantaged the
patentee. The district court excluded from consideration on
the summary judgment record the declaration of Mr. Kil
Young Sung for failure to provide a written expert witness
report. Federal Rule 26(a)(2)(B) provides that expert testi-
mony must be accompanied by a written report “if the
witness is one retained or specially employed to provide
expert testimony in the case or one whose duties as the
party’s employee regularly involve giving expert testimony.”
However, a party’s employee who does not meet this Rule
need not provide a written expert report. Tokai states that
Mr. Sung was indeed an employee exempt from the Rule
26(a)(2)(B) report requirement, and that when the issue was
raised in connection with the summary judgment proceed-
ing, Tokai was improperly barred from showing his em-
ployee status. I must agree that this procedure was flawed.

My colleagues state that the exclusion was “harmless.”
Maj. Op. at 11. When reviewing an erroneous evidentiary
ruling, the Ninth Circuit, whose procedural rules govern,
begins with a presumption of prejudice. Obrey v. Johnson,
400 F.3d 691, 701 (9th Cir. 2005) (“when reviewing the
effect of erroneous evidentiary rulings, we will begin with a
presumption of prejudice”). The Sung declaration describes
15 TOKAI CORP v. EASTON ENTERPRISES

the specially configured elements of the Floriot cigarette
lighter, explains their operation, and explains how the
Floriot safety mechanism is incompatible with the prior art
Shike utility lighter. Mr. Sung, as a designer of both utility
lighters and cigarette lighters, offered a reasoned discussion
of the prior art and its combination, relevant to the issues
before the district court. The district court exceeded its
discretion in denying Tokai the opportunity to establish the
admissibility of this evidence under Rule 26(a).
CONCLUSION
The district court referred to the known need for an im-
proved safety mechanism for utility lighters, and stated that
this need was a reason to modify the prior art to make
Tokai’s improved lighter. To the contrary, the continuing
need weighs against the obviousness of this successful
device.

Nor is it reasonable to trivialize an improvement by its
relative simplicity. To the contrary, the fact that this im-
provement eluded discovery, and that its advantages were
immediately apparent to the marketplace and to the compe-
tition, weigh in favor of nonobviousness. At a minimum,
summary judgment of invalidity was improperly granted.
My colleagues err in sustaining that judgment.