ON PETITION FOR REHEARING OF GRANT OF PETITION FOR WRIT OF MANDAMUS
Before MICHEL, Circuit Judge, BENNETT, Senior Circuit Judge, and LOURIE, Circuit Judge.ORDER
MICHEL, Circuit Judge.American Airlines, Inc. (American) petitions for rehearing of our nonprecedential March 11, 1994 order granting Lawrence B. Lockwood’s petition for a writ of mandamus, wherein we directed the district court to reinstate Lockwood’s jury demand in American’s pending action for a declaration that Lockwood’s two patents are invalid. Lockwood opposes rehearing.
American also moves for leave to file a reply, with the reply attached, and for a precedential order.
I. BACKGROUND
A. American’s Declaratory Judgment Action
This ease began when Lockwood filed a complaint against American alleging that American’s computerized reservation system infringed Lockwood’s two patents relating to self-service terminals and automatic ticket dispensing systems. Lockwood sought both damages and injunctive relief, and his jury demand was timely made. American raised a number of defenses, including the alleged invalidity of the two patents at issue; in addition, American counterclaimed for a declaration that its activities were noninfringing and, alternatively, that Lockwood’s patents are invalid or unenforceable.
After the close of discovery, American moved for summary judgment that its computerized reservation system did not infringe the claims at issue in either of Lockwood’s patents. The district court granted American’s motion for summary judgment of non-infringement, after which it dismissed the infringement complaint1 and denied Lockwood’s motion to certify its summary judgment decision for immediate appeal pursuant to Fed.R.Civ.P. 54(b). The district court held that, rather than permitting an interlocutory appeal of its judgment as to infringement, it would proceed to consideration of American’s prayer for a declaration of patent invalidity,2 citing the Supreme Court’s recent *969decision in Cardinal Chem. Co. v. Morton Int’l, Inc., — U.S. -, 113 S.Ct. 1967, 124 L.Ed.2d 1 (1993) (infringement and declaratory judgment actions joined).
Finally, on American’s motion, the district court struck Lockwood’s demand that the issue of validity be tried to a jury. The court concluded that “the remaining claims are equitable in nature [and] the plaintiff [Lockwood] is not entitled to a trial by jury as a matter of right.”
B. Lockwood’s Mandamus Petition
Following the district court’s decision to strike, Lockwood petitioned this court for a writ of mandamus directing the district court to reinstate his jury demand. We issued the writ, reasoning that because “Lockwood’s underlying claim for infringement and damages is the basis of the action at the district court” and “[t]he claim for infringement damages and any asserted defenses still exist in the case,” Lockwood remained entitled to a jury trial on the factual questions relating to validity.
American presents two arguments in its petition for rehearing. American first argues that, because the district court dismissed Lockwood’s claim for patent infringement damages, the only claim remaining is American’s claim for a declaration of patent invalidity. As American rightly asserts, contrary to erroneous statements in our previous order, the district court will not adjudicate the issue of validity as a defense to an existing infringement claim. The infringement claim exists no more. Consequently, the particulars of Lockwood’s dismissed claim can play no part in our determination whether he enjoys a Seventh Amendment right to a jury trial as to validity in American’s action for a declaratory judgment. See, e.g., In re Evangelist, 760 F.2d 27, 32 (1st Cir.1985) (appellate court refused to consider dismissed claim in determining whether a jury demand should be met, even though the claim might ultimately be reinstated); Hildebrand v. Board of Trustees, 607 F.2d 705, 710 (6th Cir.1979) (court suggested that claim for damages that was dismissed on summary judgment should not be considered when determining party’s asserted Seventh Amendment right to trial by jury).3 We no longer rely on the misstatements of our previous order.
American further argues that its action for a declaratory judgment is entirely equitable in nature, and that Lockwood therefore enjoys no right to a jury trial under the Seventh Amendment in this case even as to patent validity. But American errs as much with this second argument as it hits the mark with its first. Accordingly, our disposition of Lockwood’s petition remains the same, though our rationale differs. Because our original analysis was based upon a misunderstanding of the procedural posture of the case, we vacate our March 11, 1994 order and replace it with the analysis presented below.
II. DISCUSSION
A. Protection of the Right to a Jury By Mandamus
American argues that, as a threshold matter, Lockwood has failed to make the *970extraordinary showing required for mandamus. American maintains that we need not address Lockwood’s Seventh Amendment claim at this time, asserting that the error of which Lockwood complains, if it occurred at all, can simply be reviewed on appeal after the entry of a final judgment in the case. While we must begin, as American suggests, with the familiar principle that “the remedy of mandamus is a drastic one, to be invoked only in extraordinary situations,” Allied Chem. Corp. v. Daiflon, Inc., 449 U.S. 33, 34, 101 S.Ct. 188, 190, 66 L.Ed.2d 193 (1980), we can pay no less heed to the Supreme Court’s Seventh Amendment jurisprudence. As the Court, per Justice Sutherland, once stressed:
Maintenance of the jury as a fact-finding body is of such importance and occupies so firm a place in our history and jurisprudence that any seeming curtailment of the right to a jury trial should be scrutinized with the utmost care.
Dimick v. Schiedt, 293 U.S. 474, 486, 55 S.Ct. 296, 301, 79 L.Ed. 603 (1935). See also Jacob v. City of New York, 315 U.S. 752, 752-53, 62 S.Ct. 854, 854-55, 86 L.Ed. 1166 (1942) (Murphy, J.) (“The right of jury trial in civil cases at common law is a basic and fundamental feature of our system of federal jurisprudence which is protected by the Seventh Amendment. A right so fundamental and sacred to the citizen, whether guaranteed by the Constitution or provided by statute, should be jealously guarded by the courts.”); Parsons v. Bedford, 28 U.S. (3 Pet.) 433, 446, 7 L.Ed. 732 (1830) (Story, J.) (“The trial by jury is justly dear to the American people. It has always been an object of deep interest and solicitude, and every encroachment upon it has been watched with great jealousy.”). Accordingly, “the right to grant mandamus to require jury trial where it has been improperly denied is settled.” Beacon Theatres, Inc. v. Westover, 359 U.S. 500, 511, 79 S.Ct. 948, 957, 3 L.Ed.2d 988 (1959) (reversing circuit court’s refusal to issue writ of mandamus reinstating petitioner’s jury demand). As the Court observed in Dairy Queen, Inc. v. Wood, it is “the responsibility of the Federal Courts of Appeals to grant mandamus where necessary to protect the constitutional right to trial by jury.” 369 U.S. 469, 472, 82 S.Ct. 894, 897, 8 L.Ed.2d 44 (1962).
The cases that American cites to the contrary, First National Bank v. Warren, 796 F.2d 999 (7th Cir.1986), and In re Don Hamilton Oil Co., 783 F.2d 151 (8th Cir.1986), are unavailing. In Hamilton, the Eighth Circuit declined to issue a writ of mandamus ordering a jury trial on the issue of back wages under the Fair Labor Standards Act, 29 U.S.C. § 217 (1988). The court, in a brief per curiam opinion, noted that the three circuit courts to consider this question on the merits had held that an action based on section 217 entails no Seventh Amendment right to a jury trial. 783 F.2d at 151-52. In light of the decisions of the other circuits adverse to Hamilton’s position, as well as what it termed “the questionable nature of the legal issue presented,” id. at 152, the court denied Hamilton’s petition without prejudice. Unlike the court in Hamilton, we are asked to evaluate the petitioner’s right to a jury trial on the factual questions relating to patent validity,4 a right that is protected by the Seventh Amendment when those *971questions arise in a paradigmatic patent infringement suit. Patlex Corp. v. Mossinghoff, 758 F.2d 594, 603, 225 USPQ 248, 250 (Fed.Cir.1985). The scant support Hamilton offers for American’s position cannot stand against Beacon Theatres and Dairy Queen.
The Seventh Circuit’s holding in First National offers American no more support than does Hamilton; in fact, it supports Lockwood. In First National, the court declined to issue a writ of mandamus ordering a jury trial on the issue of disgorgement in an action alleging unjust enrichment. The court undertook a detailed analysis of Beacon Theatres, Dairy Queen, and the cases cited therein, concluding that mandamus is an appropriate remedy for the wrongful denial of the right to a jury trial where (a) the legal and equitable claims to be tried rest on a common factual foundation, and (b) a prior judgment on the equitable elaim(s) might foreclose the legal claim by issue or claim preclusion. 796 F.2d at 1002-04. Because there was “no possibility of issue or claim preclusion” in the ease, the court denied First National’s petition. Id. at 1006 (emphasis added). Unlike the petitioner in First National, Lockwood may confront issue-pre-clusive effects from a bench trial on American’s claim of unenforceability; such effects, if they occur, are injuries “not easily repaired on appeal.” First National, 796 F.2d at 1003. Thus, the Seventh Circuit’s approach in First National, far from supporting American’s position, militates in favor of issuing the writ in this case.
We acknowledge that to review the district court’s decision to strike Lockwood’s jury demand by means of a pre-judgment mandamus petition “presents all the vices of an interlocutory appeal.” Id. at 1001. We nonetheless conclude, along with a number of our sister circuits, that the teachings of Dairy Queen and Beacon Theatres regarding the propriety of mandamus to cure a wrongful denial of the right to trial by jury are beyond cavil. Nissan Motor Corp. v. Burciaga, 982 F.2d 408, 408 (10th Cir.1992) (“[M]andamus is appropriate relief when it is necessary to protect the right to a jury trial.”) (citing Dairy Queen); Allegheny Int'l, Inc. v. Allegheny Ludlum Steel Corp., 920 F.2d 1127, 1134 (3d Cir.1990) (same); Mondor v. U.S. Dist. Court, 910 F.2d 585, 585-86 (9th Cir.1990) (same); Maldonado v. Flynn, 671 F.2d 729, 731 (2d Cir.1982) (citing Beacon Theatres); Filmon Process Corp. v. Sirica, 379 F.2d 449, 450-51, 153 USPQ 440, 440 (D.C.Cir.1967) (citing both Dairy Queen and Beacon Theatres). Accordingly, rather than defer resolution of Lockwood’s Seventh Amendment claim until he takes an appeal from a final judgment in the district court, we determine now whether the court improperly struck his jury demand.
B. Lockwood’s Right to a Jury
1. The Framework, for Assessing Seventh Amendment Claims
The Seventh Amendment to the United States Constitution declares that “[i]n suits at common law ... the right of trial by jury shall be preserved.... ” The thrust of the Amendment was to preserve the right to jury trial as it existed in 1791; indeed, for a time the appropriate rules of the common law as they existed in 1791 were the sole measure of “the scope and meaning of the Seventh Amendment.” Dimick, 293 U.S. at 476, 55 S.Ct. at 297; cf. Thompson v. Utah, 170 U.S. 343, 350, 18 S.Ct. 620, 622-23, 42 L.Ed. 1061 (1898) (using same test for scope of Sixth Amendment jury rights). It is now well settled, however, that the constitutional right to a jury trial extends beyond the bounds set by the common law forms of action existing at the time of the Amendment’s adoption. Curtis v. Loether, 415 U.S. 189, 193-94, 94 S.Ct. 1005, 1007-08, 39 L.Ed.2d 260 (1974). The Court, through Mr. Justice Story, established the basic principle in 1830:
The phrase “common law,” found in [the Seventh Amendment], is used in contradistinction to equity, and admiralty and maritime jurisprudence.... By common law, [the Seventh Amendment’s framers] meant what the constitution denominated in the third article “law;” not merely suits, which the common law recognized among its old and settled proceedings, but suits in which legal rights were to be ascertained and determined, in contradistinction to those where equitable rights alone were recog*972nized, and equitable remedies were administered; or where, as in admiralty, a mixture of public law, and of maritime law and equity, was often found in the same suit.... In a just sense, the amendment then may well be construed to embrace all suits, which are not of equity and admiralty jurisdiction, whatever may be the peculiar form which they may assume to settle legal rights.
Parsons, 28 U.S. (3 Pet.) at 445-46. Accord Chauffeurs Local No. 391 v. Terry, 494 U.S. 558, 564, 110 S.Ct. 1339, 1344, 108 L.Ed.2d 519 (1990) (quoting Parsons). In short, any adjudication of a legal, as opposed to an equitable, right falls within the scope of the Amendment. Tull v. United States, 481 U.S. 412, 417, 107 S.Ct. 1831, 1835, 95 L.Ed.2d 365 (1987) (Seventh Amendment “require[s] a jury trial on the merits in those actions that are analogous to ‘Suits at common law.’ ”). For example, the Seventh Amendment embraces the adjudication of a legal right created by statute, even where that right has no precursor among the suits and actions known to the common law. Id. It is, of course, a simpler matter to state the Amendment’s scope in the abstract than to mark out its boundaries with precision in a given case.
To determine whether a particular action resolves legal or equitable rights, we examine both the nature of the issues involved and the nature of the remedy sought. Specifically, the test for statutory actions involves two steps:
First, we compare the statutory action to 18th-century actions brought in the courts of England prior to the merger of the courts of law and equity. Second, we examine the remedy sought and determine whether it is legal or equitable in nature.
Chauffeurs, 494 U.S. at 565,110 S.Ct. at 1345 (quoting Tull, 481 U.S. at 417-18, 107 S.Ct. at 1835-36); see Ross v. Bernhard, 396 U.S. 531, 538 n. 10, 90 S.Ct. 733, 738 n. 10, 24 L.Ed.2d 729 (1970).5 Thus, if a particular action entails either the adjudication of legal rights, Tull, 481 U.S. at 425, 107 S.Ct. at 1839, or, alternatively, the implementation of legal remedies, Curtis, 415 U.S. at 195, 94 S.Ct. at 1008-09, the district court must hon- or a jury demand to the extent that disputed issues of fact concerning those rights and remedies require a trial.6
We proceed to analyze Lockwood’s Seventh Amendment claim within this framework, concluding that he is entitled to a jury trial as a matter of right in this case. Our decision preserves, as it must, the patentee’s ability to compel a jury trial on the factual questions relating to patent validity.
2. The Nature of Declaratory Judgment Actions
The Declaratory Judgment Act, passed in 1934, eh. 512, 48 Stat. 955 (codified as amended at 28 U.S.C. §§ 2201-02 (1988)), created an action unknown at common law.7 *97310A Charles A. Wright, Arthur R. Miller & Mary Kay Kane, Federal Practice and Procedure § 2752 (2d Ed.1983). Designed particularly to assist potential litigants unable to settle their rights and liabilities through then-existing procedures, an action for “declaratory relief is sui generis and is as much legal as equitable.” Borchard, supra note 7, at 26-28, 239. Indeed, from the Act’s passage in 1934 until the merger of law and equity in the federal system in 1938, declaratory judgment actions were heard on both the law and the equity sides of the federal courts. See, e.g., United States ex rel. Guest v. Perkins, 17 F.Supp. 177 (D.D.C.1936) (law side); Texas Co. v. Wilkinson, 21 F.Supp. 771 (E.D.La.1937) (equity side). This has led a number of courts to remark that declaratory judgments are neither legal nor equitable, rather than both. See, e.g., Gulfstream Aerospace Corp. v. Mayacamas Corp., 485 U.S. 271, 284, 108 S.Ct. 1133, 1140-41, 99 L.Ed.2d 296 (1988); Hartford Fin. Sys., Inc. v. Florida Software Servs., 712 F.2d 724, 727 (1st Cir.1983); American Safety Equip. Corp. v. J.P. Maguire & Co., 391 F.2d 821, 824 (2d Cir.1968). The variety of formulations should not, however, distract one from the basic point: declaratory judgment actions are, for Seventh Amendment purposes, only as legal or equitable in nature as the controversies on which they are founded. See Fed.R.Civ.P. 57 (“Declaratory Judgments”); Simler v. Conner, 372 U.S. 221, 223, 83 S.Ct. 609, 611, 9 L.Ed.2d 691 (1963) (“The fact that the action is in form a declaratory judgment case should not obscure the essentially legal nature of the action.”).
Importantly, the Supreme Court has followed this principle even where, as here, the prayer for a declaration is joined with a request for injunctive relief. Beacon Theatres, 359 U.S. at 511, 79 S.Ct. at 957. In Beacon Theatres, the declaratory judgment plaintiff prayed for both a declaration that its contracts with movie distributors did not violate the antitrust laws, and an injunction preventing the defendant from bringing an antitrust suit based on those contracts. Id. at 502-03, 79 S.Ct. at 952-53. The Court required a jury trial on the antitrust issues on Seventh Amendment grounds, reasoning as follows:
[I]f Beacon would have been entitled to a jury trial in a treble damages suit against Fox it cannot be deprived of that right merely because Fox took advantage of the availability of declaratory relief to sue Beacon first. Since the right to trial by jury applies to treble damages suits under the antitrust laws ... the Sherman and Clayton Act issues on which Fox sought a declaration were essentially jury questions.
Id. at 504, 79 S.Ct. at 953. See also American Safety Equip., 391 F.2d at 824 (to assess Seventh Amendment claim, “courts have looked to the basic nature of the suit in which the issues involved would have arisen if Congress had not created the Declaratory Judgment Act.”). Because the declaratory judgment action is itself neither legal nor equitable, the historical inquiry required by the Seventh Amendment takes as its object the nature of the underlying controversy. To assess Lockwood’s right to a jury trial in the context of American’s prayer for a declaration that Lockwood’s patents are invalid, we must therefore determine how patent validity was adjudicated prior to merger and absent the declaratory judgment procedure.
3. The Adjudication of Patent Validity
Before the passage of the Declaratory Judgment Act in 1934, a party concerned that its present or future activities might give rise to patent infringement liability had no legal or equitable procedure to test the validity of the patent at issue. Zenie Bros. v. Miskend, 10 F.Supp. 779, 781, 25 USPQ 153, 155 (S.D.N.Y.1935) (“It is said that a suit by a private party who has no patent himself to declare a competitor’s patent void is without precedent. The charge is true.”); Borchard at 802-06; Note, Federal Jurisdiction Over Declaratory Judgment Proceedings in Patent Cases, 45 Yale L.J. 1287, 1289 (1936). *974The worried party could only wait for the patentee to bring an infringement suit and raise the patent’s invalidity as an affirmative defense.8 Patent validity simply was not litigated in isolation from an infringement claim.
As we noted in Arrowhead Indus. Water, Inc. v. Ecolochem, Inc., patent owners could threaten infringement suits without ever bringing them, engaging “in a danse macabre, brandishing a Damoclean threat with a sheathed sword.” 846 F.2d 731, 735, 6 USPQ2d 1685, 1688 (Fed.Cir.1988). Where the patentee had initiated a suit for infringement and subsequently decided to withdraw the claim prior to trial, the alleged infringer had no way to force the patentee to revive the infringement claim so as to allow for a determination of validity. Leach v. Ross Heater & Mfg., 104 F.2d 88, 91, 41 USPQ 558, 560-61 (2d Cir.1939). The only suit an accused infringer faced with the threat of an infringement action could bring was an action in state court for unfair competitive practices — namely, the patentee’s bad faith attempts to destroy the party’s business with groundless threats of infringement suits. See, e.g., Racine Paper Goods Co. v. Dittgen, 171 F. 631 (7th Cir.1909); A.B. Farquhar Co. v. National Harrow Co., 102 F. 714 (3d Cir.1900). But this action, even if successful, produced no ultimate decision on the question of validity, and thus fell short of what a declaratory judgment action for invalidity would eventually offer. Zenie Bros., 10 F.Supp. at 782, 25 USPQ at 156; Emack v. Kane, 34 F. 46 (C.C.N.D.Ill.1888).
American maintains its declaratory judgment action against Lockwood in order to test the validity of Lockwood’s patents. Insofar as the validity of the patents is adjudicated, American’s action resembles nothing so much as a suit for patent infringement in which the affirmative defense of invalidity has been pled, and Lockwood’s right to a jury trial must be determined accordingly.9 The primary difference be*975tween American’s action and the infringement suit that would formerly have been required for an adjudication of validity is that the parties’ positions here have been inverted,10 and such an inversion cannot operate to frustrate Lockwood’s Seventh Amendment rights. Beacon Theatres, 359 U.S. at 504, 79 S.Ct. at 953; Owens-Illinois, Inc. v. Lake Shore Land Co., 610 F.2d 1185, 1189 (3d Cir.1979) (“If the declaratory judgment action does not fit into one of the existing equitable patterns but is essentially an inverted law suit — an action brought by one who would have been a defendant at common law — then the parties have a right to a jury.”); James v. Pennsylvania General Ins. Co., 349 F.2d 228, 230 (D.C.Cir.1965) (“The right to jury trial in a declaratory judgment action depends ... on whether the action is simply the counterpart of a suit in equity— that is, whether an action in equity could be maintained if declaratory judgment were unavailable — or whether the action is merely an inverted lawsuit.”); Johnson v. Fidelity & Casualty Co., 238 F.2d 322, 324-25 (8th Cir.1956); Hargrove v. American Cent. Ins. Co., 125 F.2d 225, 228 (10th Cir.1942); Pacific Indemnity Co. v. McDonald, 107 F.2d 446, 448 (9th Cir.1939).11
*9764. The Patentee’s Right to a Jury Trial at Common Law
As we have demonstrated, the Seventh Amendment preserves to Lockwood the same right to a jury trial on the factual questions relating to validity in a declaratory judgment action that he would have enjoyed had the validity of his patents been adjudicated in a suit for patent infringement according to eighteenth-century English practice.
In eighteenth-century England, allegations of patent infringement could be raised in both actions at law and suits in equity. 2 Joseph Story, Commentaries on Equity Jurisprudence §§ 930-34, at 236-39 (photo, reprint 1988) (13th ed. 1886); 5 Moore ¶ 38.11[5]-[6]. Because an action at law for damages could not obviate the need for perpetual litigation over future acts of infringement nor ascertain the full extent of the injury done to one’s interests by past acts of infringement, courts of equity gave a patentee the option of pursuing injunctions and accountings against alleged infringers. 2 Story at §§ 932, 933. The choice of forum and remedy, and thus of the method of trial, was left with the patentee. Nineteenth-century American practice followed the same basic pattern. Marsh v. Seymour, 97 U.S. 348, 349, 24 L.Ed. 963 (1877) (“Owners of a patent ... may seek redress for the unlawful use of the improvement which it secures, in the Circuit Court, by a suit at law or in equity, at their option_”); Wise v. Grand Ave. Ry. Co., 33 F. 277, 278 (C.C.W.D.Mo.1888) (“It is now settled that a patentee may sue either at law or in equity, according as the relief demanded is of a legal or equitable nature.”). If the patentee sought only damages, the patentee brought an action at law; in such a case, the defense of invalidity was tried to the jury, assuming that a jury had been demanded. Battin v. Taggart, 58 U.S. (17 How.) 74, 85, 15 L.Ed. 37 (1854); Wood v. Underhill, 46 U.S. (5 How.) 1, 5-6, 12 L.Ed. 23 (1847). However, if the patentee facing past acts of infringement nevertheless sought only to enjoin future acts of infringement, the patentee could only bring a suit in equity, and the defense of invalidity ordinarily would be tried to the bench. Root v. Railway Co., 105 U.S. 189, 205-06, 26 L.Ed. 975 (1881).12 Under both English and American practice, then, it was the patentee who decided in the first instance whether a jury trial on the factual questions relating to validity would be compelled.
We cannot, consistent with the Seventh Amendment, deny Lockwood that same choice merely because the validity of his patents comes before the court in a declaratory judgment action for invalidity rather than as a defense in an infringement suit. Lockwood is entitled to have the factual questions relating to validity in this case tried to a jury as a matter of right.
C. American’s Counterarguments
American maintains that its action for a declaratory judgment of invalidity is entirely equitable in nature, and thus provides Lockwood no grounds to assert that he has been wrongfully deprived of a jury trial. American does not, however, cite a single eighteenth-century English suit in equity where, with the alleged infringer as plaintiff, the court adjudicated the validity of a patent. Instead, American cites a number of cases for the proposition that “[t]he courts are unanimous ... in holding that there is no right to trial by jury in an action seeking only a declaration of patent invalidity and unenforeeability.” In addition, American broadly asserts that “an action for declaratory relief is ordinarily equitable in nature,” and that Lockwood’s Seventh Amendment claim may be disposed of accordingly. We consider each of these arguments in turn, concluding that both are deeply flawed.
*9771. Declaratory Judgment Decisions
American maintains that the absence of the right to a jury trial in an action for a declaratory judgment of invalidity has already been settled in a number of cases. We discuss these cases briefly.13
American relies primarily on two cases from the Ninth Circuit. In Shubin v. United States Dist. Court, 313 F.2d 250, 136 USPQ 405 (9th Cir.), cert. denied, 373 U.S. 936, 83 S.Ct. 1539, 10 L.Ed.2d 690 (1963), the Ninth Circuit concluded that, because the defendant patentee sought only injunctive relief in its counterclaim of infringement, the alleged infringer’s action for a declaratory judgment of invalidity could be tried to the bench. Because the parties had stipulated to the fact that no infringement had yet occurred, the court limited its holding to the “peculiar pleadings of this case, as modified by its admissions and stipulations.” Id. at 252, 136 USPQ at 406. In short, no claim for damages could have been brought. Applying Beacon Theatres, the court reasoned as follows:
The defendants seek only a permanent injunction against threatened infringement. This is not a legal issue. Defendants’ only remedy would be in equity.
Id. at 251, 136 USPQ at 405-06 (emphasis in original). The court focused, as we have, on the sort of action the defendant patentee could have brought at common law to raise the issues presented in the ease. The patentee’s counterclaim for a permanent injunction against future infringement, paired with its stipulation to the absence of any claim for infringement damages, convinced the court that the issues in the case were purely equitable ones. Likewise, in Anti-Monopoly, Inc. v. General Mills Fun Group, 611 F.2d 296, 204 USPQ 978 (9th Cir.1979), a trademark case, the court focused on the fact that only injunctive and declaratory claims and counterclaims remained to be adjudicated, concluding that the action was equitable. In neither Shubin nor Anti-Monopoly, however, did the Ninth Circuit address whether an action for a declaratory judgment of invalidity standing alone entitles the defendant pat-entee to a jury trial on the factual questions relating to validity as a matter of right. Neither of the cases stands for the broad proposition America would have us draw from them.
American also relies on two cases from the Second Circuit. In Beaunit Mills, Inc. v. Eday Fabric Sales Corp., 124 F.2d 563, 565, 52 USPQ 196, 198 (2d Cir.1942), the Second Circuit faced the question whether the district court’s order striking the defendant’s jury demand was final for purposes of appeal. After dismissing the appeal as interlocutory, the court went on in dicta to ponder the merits of the defendant patentee’s claim that it had been wrongfully denied a jury trial. While expressing some doubt on the question, the court suggested that, given the “incidental” nature of the patentee’s claims, the Seventh Amendment question could best be resolved according to the principle that “equity having assumed jurisdiction should go on to afford complete relief.” Id. at 566, 52 USPQ at 199.14 The Supreme Court, referring to the doctrine that equity may determine incidental legal rights in order to afford complete relief, has since made it clear “that no such rule may be applied in the federal courts.” Dairy Queen, 369 U.S. at 470, 82 S.Ct. at 896.15 See also Kennedy v. Lakso Co., 414 F.2d 1249, 1252 (3d Cir.1969) (patent infringement case) (“As a result of the decisions [in Beacon Theatres and Dairy *978Queen], the doctrine that an action which seeks both damages and equitable relief is predominantly equitable and therefore may not be tried to a jury, has been reversed.”); McCoid, Procedural Reform, supra note 11, at 5-6 (same). Beaunit, offering little more than a suggestion that the Supreme Court has since repudiated, offers American nothing at all.
In Diematic Mfg. Corp. v. Packaging Indus., 516 F.2d 975, 186 USPQ 241 (2d Cir.), cert. denied, 423 U.S. 913, 96 S.Ct. 217, 46 L.Ed.2d 141 (1975), as in Beaunit, the court considered whether a district court order was final for purposes of appeal — in this case, an order staying arbitration. In making its determination, the Second Circuit stated that an action “is to be considered equitable for [these] purposes unless the equitable relief sought can be characterized as ‘merely incidental.’ ” Diematic, 516 F.2d at 978-79, 186 USPQ at 244 (quoting Standard Chlorine, Inc. v. Leonard, 384 F.2d 304, 309 (2d Cir.1967)). While the general policy against allowing interlocutory appeals justified the presumption that the action was equitable in Diematic,16 in this case the policies underlying the right to a trial by jury require just the opposite approach. See Dairy Queen, 369 U.S. at 473 n. 8, 82 S.Ct. at 897 n. 8 (“It would make no difference if the equitable cause clearly outweighed the legal cause.... As long as any legal cause is involved the jury rights it creates control.”) (quoting Thermo-Stitch, Inc. v. Chemi-Cord Processing Corp., 294 F.2d 486, 491 (5th Cir.1961)). Because the holding of Diematic was animated by policy concerns quite contrary to those of the Supreme Court’s Seventh Amendment jurisprudence, we decline to pattern our decision in this case after it.
Finally, American argues that two early district court decisions concerning the right to a jury trial in declaratory judgment actions under the patent laws support its position in this court. Both Hall v. Kish, 11 F.R.D. 292, 88 USPQ 548 (N.D.Ohio 1951), and Brody v. Kafka, 73 USPQ 469 (S.D.N.Y.1947), involved an action for a declaratory judgment of invalidity and noninfringement; in neither case did the defendant patentee counterclaim for infringement damages, though both defendants made timely jury demands. In both cases, the district court concluded that, given the plaintiffs request for injunctive relief and the plaintiffs failure to counterclaim for damages, the issues involved were equitable and should thus be tried to the bench. First, because they are the decisions of district courts, Hall and Bro-dy can at most persuade rather than bind us. Second, while we concede that these cases involve actions nearly indistinguishable from American’s action against Lockwood, we conclude that their holdings have clearly been vitiated by both Beacon Theatres, 359 U.S. at 504, 79 S.Ct. at 953, and Dairy Queen, 369 U.S. at 472-73, 82 S.Ct. at 896-97, and thus decline to follow them. We also note that in the more recent case of Minnesota Automotive, Inc. v. Stromberg Hydraulic Brake & Coupling Co., the district court, citing both the contrary decision in Brody and the Supreme Court’s subsequent decision in Beacon Theatres, came to the same conclusion regarding a defendant patentee’s Seventh Amendment right to a jury trial as we come to today. 167 USPQ 165, 166 (D.Minn.1970).
2. Nature of Declaratory Relief
American’s second major argument against Lockwood’s right to a jury trial in this case focuses on what it maintains is the invariably equitable nature of declaratory judgment actions.
American asserts, for example, that its declaratory judgment action is most analogous to an equitable bill quia timet, and that declaratory judgment actions are inherently equitable. American relies primarily on the Supreme Court’s decision in Great Lakes Dredge & Dock Co. v. Huffman, 319 U.S. 293, 300, 63 S.Ct. 1070, 1074, 87 L.Ed. 1407 *979(1943), to support both these propositions. In Great Lakes, the Court reviewed a challenge to the constitutionality of the Louisiana unemployment compensation program, a challenge initiated in the district court as a declaratory judgment action. The specific question before the Court in Great Lakes was whether “considerations which have led federal courts of equity to refuse to enjoin the collection of state taxes, save in exceptional cases, require a like restraint in the use of the declaratory judgment procedure.” Id. at 299, 63 S.Ct. at 1073. Analogizing to the discretion of the courts in suits quia timet, the Court held that, having been “Mailed upon to adjudicate what is essentially an equitable cause of action, the district court was as free as in any other suit in equity to grant or withhold relief upon established equitable principles.” Id. at 300, 63 S.Ct. at 1074. Great Lakes does not, as American suggests, stand for the proposition that declaratory judgment actions are always, or even usually, equitable for Seventh Amendment purposes. No Seventh Amendment issue whatever arose in the case.17
Contrary to American’s assertions, it does not appear that an alleged infringer could have used a bill quia timet to challenge patent validity in a court of equity. We have not been informed of any such cases by American. Bills quia timet were used in actions such as controversies relating to property title, Holland v. Challen, 110 U.S. 15, 20, 3 S.Ct. 495, 497-98, 28 L.Ed. 52 (1884), or attempts to cancel private instruments, Di Giovanni v. Camden Fire Ins. Ass’n, 296 U.S. 64, 68, 56 S.Ct. 1, 3, 80 L.Ed. 47 (1935). Bills quia timet were generally appropriate if there was a danger that a defense at law might be prejudiced or lost if not tried immediately. Di Giovanni, 296 U.S. at 68, 56 S.Ct. at 3. Equity could also entertain a bill quia timet to appoint a receiver to protect some interest, to require security, or to compel a debtor to discharge a debt. See generally 2 Story §§ 825-51, at 156-71. It is clear, however, that the bill quia timet has nothing to teach us about Lockwood’s right to a jury trial in this case, an inversion of an infringement damages suit.
American also stresses that all suits for a declaratory judgment of invalidity that were brought after the passage of the Declaratory Judgments Act in 1934 but before the merger of law and equity in the federal system in 1938 were brought as bills in equity. American cites the following cases as examples of suits including a request for declaratory relief, brought in equity, in that four-year period: E.W. Bliss Co. v. Cold Metal Process Co., 102 F.2d 105, 41 USPQ 342 (6th Cir.1939); Derman v. Gersten, 22 F.Supp. 877 (E.D.N.Y.1938); Duro Test Corp. v. Welsbach Street Lighting Co. of Am., 21 F.Supp. 260 (D.Del.1937); Petersime Incubator Co. v. Bundy Incubator Co., 34 USPQ 251 (S.D.Ohio 1937); Cromwell Novelty Corp. v. Carp, 36 USPQ 413 (S.D.N.Y.1937); Lionel Corp. v. De Filippis, 15 F.Supp. 19 (E.D.N.Y.1936); Mitchell & Weber, Inc. v. Williams-bridge Mills, Inc., 14 F.Supp. 954, 32 USPQ 506 (S.D.N.Y.1936); and Ladenson Co. v. Overspred Stoker Co., 89 F.2d 242 (7th Cir.1937). American can rely on these cases only to show the mere fact that declaratory judgments were sought in courts of equity before the merger of law and equity, a fact not in dispute. None of the cases American cites discuss whether equity was the only proper forum or whether Seventh Amendment rights were at issue.
In sum, the cases American cites either focus on the presence of a request for injunc-tive relief and the absence of a request for monetary damages or involve issues other than the litigants’ Seventh Amendment rights. What none of the cases discuss is a common law cause of action whereby an al*980leged infringer could call the patentee into court for an adjudication of a patent’s validity. And only evidence of such a common law cause of action would support the position American takes in this case.
III. CONCLUSION
We conclude that a suit for a declaratory judgment of invalidity is more comparable to a lawsuit for patent infringement than to any historical equitable action. Prior to the Declaratory Judgments Act, an alleged infringer had no action in equity specifically to challenge the validity of a patent and obtain an adjudication thereon. Because a lawsuit for patent infringement could be maintained in a court of law, patent validity was an issue that, if raised, could be decided in a court of law, in contradistinction to an issue that could be decided only in a court of equity, such as fraud in obtaining the patent. Because patent validity is not purely an equitable issue, and because the pending declaratory judgment action is most comparable to an inversion of a patent infringement lawsuit, Lockwood is entitled under the Seventh Amendment to trial by jury in this declaratory judgment action which is being pursued by American to determine validity of his patents.
Accordingly,
IT IS ORDERED THAT:
(1) The court’s March 11, 1994 order granting Lockwood’s mandamus petition is vacated.
(2) American’s petition for rehearing is granted.
(3) American’s motion for leave to file a reply is granted.
(4) Lockwood’s petition for writ of mandamus is granted. The district court is directed to reinstate Lockwood’s jury demand.
(5) American’s letter request for a prece-dential order deciding the petition for writ of mandamus is granted.
(6)American’s alternative request for reissue of the March 11, 1994 order in prece-dential form is dismissed as moot.
ORDER
Jan. 11, 1995
A suggestion for rehearing in banc having been filed by the respondent in this case, and a response thereto having been invited by the court and filed by the petitioner,
UPON CONSIDERATION THEREOF, it is
ORDERED that the suggestion for rehearing in banc be, and the same hereby is, DECLINED.
. The parties’ initial submissions on the mandamus petition were not altogether clear as to whether there had also been a dismissal or, instead, merely an entry of a partial summary judgment. The infringement action was, however, dismissed. In any case, the manner in which the district court implemented its decision on infringement does not affect the merits of Lockwood's mandamus petition, as we demonstrate in Section II, infra.
. At least where an infringement suit and a declaratory judgment action coexist, our cases encourage district courts to adjudicate questions of both infringement and validity when both are raised, without reference to the order in which *969they are raised. Compare Lindemann Maschinenfabrik GmbH v. American Hoist & Derrick Co., 730 F.2d 1452, 1463, 221 USPQ 481, 489 (Fed.Cir.1984) ("[a] district court should decide validity and infringement and should enter a judgment on both issues when both are raised in the same proceeding”) (infringement alleged in initial complaint, with counterclaim for declaration of invalidity) with Stratoflex, Inc. v. Aeroquip Corp., 713 F.2d 1530, 1540, 218 USPQ 871, 880 (Fed.Cir.1983) ("[w]hen presented with patent validity and infringement issues, trial courts should ... decide both”) (prayer for declaration of invalidity in initial complaint, with counterclaim for infringement).
The Supreme Court has expressed the same general preference. Sinclair & Carroll Co. v. Interchemical Corp., 325 U.S. 327, 330, 65 S.Ct. 1143, 1145, 89 L.Ed. 1644 (1945) ("There has been a tendency among the lower federal courts in infringement suits to dispose of them where possible on the ground of non-infringement without going into the question of validity of the patent. It has come to be recognized, however, that of the two questions, validity has the greater public importance, and the District Court in this case followed what will usually be the better practice by inquiring fully into the validity of this patent.”) (citations omitted).
. Because we accept American's argument on this point, we need not dwell on the many cases American cites in support of it.
. "While the ultimate question of patent validity is one of law, the § 103 condition [i.e., obviousness] ... lends itself to several basic factual inquiries.” Graham v. John Deere Co., 383 U.S. 1, 17, 86 S.Ct. 684, 694, 15 L.Ed.2d 545 (1966) (citation omitted) (emphasis added). It is, of course, beyond peradventure that the trier of fact must answer the Graham inquiries relating to “(1) the scope and content of the prior art; (2) the differences between the prior art and the claims at issue; (3) the level of ordinary skill in the art at the time when the invention was made; and (4) objective evidence of nonobviousness.” Specialty Composites v. Cabot Corp., 845 F.2d 981, 989, 6 USPQ2d 1601, 1607 (Fed.Cir.1988). Consequently, "[t]hese factual findings underlying the legal conclusion of obviousness are reviewed under the 'clearly erroneous' standard,” while “the ultimate legal conclusion of obviousness is scrutinized as a matter of law.” Id.., 6 USPQ2d at 1606-07.
Indeed, the inquiry into obviousness is but one component of the ultimate legal conclusion of validity vel non, which itself turns on additional underlying questions of fact. These include anticipation, Atlas Powder Co. v. E.I. du Pont De Nemours & Co., 750 F.2d 1569, 1573, 224 USPQ 409, 411 (Fed.Cir.1984), prior public use or sale, U.S. Envtl. Prods. v. Westall, 911 F.2d 713, 715, 15 USPQ2d 1898, 1900 (Fed.Cir.1990), and the sufficiency of a specification's disclosure, Utter v. Hiraga, 845 F.2d 993, 998, 6 USPQ2d 1709, 1714 (Fed.Cir.1988).
.A third component comes into play in the Seventh Amendment inquiry when a claim that is legal in nature asserts a public right. The Court has cautioned that the Seventh Amendment does not automatically entitle a parly to a jury trial if Congress can and has assigned adjudication of the legal claim concerning such public right exclusively to an administrative agency. Granfinanciera, S.A. v. Nordberg, 492 U.S. 33, 42 n. 4, 109 S.Ct. 2782, 2790 n. 4, 106 L.Ed.2d 26 (1989) (assignment to bankruptcy court). However, as "[n]o one disputes that an action for [a declaration of patent invalidity] may properly be brought in an Article III court,” this limitation on Seventh Amendment protection “does not affect our analysis.” Chauffeurs, 494 U.S. at 565 n. 4, 110 S.Ct. at 1345 n. 4 (distinguishing Granfinanciera). In other words, assuming arguendo that patents confer purely public rights, litigation concerning those patent rights in Article III courts comes within the protection provided by the Seventh Amendment.
. It is important to note that the Court, in Tull, expressly repudiated the contention "that both the cause of action and the remedy must be legal in nature before the Seventh Amendment right to a jury trial attaches.” 481 U.S. at 421 n. 6, 107 S.Ct. at 1837 n. 6 (emphasis added). The inquiry is not a mechanical one, and the steps in our analysis are not in the nature of necessary and sufficient conditions. "Our search,” the Court held, "is for a single historical analog, taking into consideration the nature of the cause of action and the remedy as two important factors.” Id. at 422 n. 6, 107 S.Ct. at 1838 n. 6.
. The roots of the remedy actually stretch back to Roman law of the pre-classical period. Edwin M. Borchard, Declaratory Judgments 87 (2d ed.1941). Maturing in the Civil Law of the Middle Ages, id. at 90-101, the modern English declaratory judgment action, developed in Chancery in the late nineteenth century, was modeled on that of Scotland. Id. at 125-31. See also *973George W. Pugh, The Federal Declaratory Remedy: Justiciability, Jurisdiction and Related Problems, 6 Vand.L.Rev. 79, 79-80 (1952) ("Although it is quite true that from time immemorial Anglo-American courts of equity had afforded what amounted to declaratory relief in narrowly restricted areas (such as the action to quiet title), there was no concept, even in equity, of a general declaratory action.”).
. Invalidity is currently a statutorily specified affirmative defense. 35 U.S.C. § 282(2) — (3) (1988). It has long been a defense in the case law. See, e.g., Evans v. Chambers, 8 F.Cas. 837, 837-38 (C.C.D.Pa.1807) (No. 4,555).
. In other words, "[o]ur search ... for a single historical analog, taking into consideration the nature of the cause and the remedy as two important factors," Tull, 481 U.S. at 422 n. 6, 107 S.Ct. at 1837 n. 6, has produced one satisfactory analog — namely, a suit for patent infringement in which the affirmative defense of invalidity has been pled.
The British writ of scire facias, while it may at first appear to be a closer analog to the case at bar, was brought by the king or in his name and was used to attack fraudulently obtained patents. The Supreme Court, per Justice Miller, reviewed the use of this writ to repeal patents in United States v. American Bell Telephone Co., 128 U.S. 315, 9 S.Ct. 90, 32 L.Ed. 450 (1888). That history was as follows:
Charters and patents authenticating grants of personal privileges were in the earlier days of the English government made by the crown. They were supposed to emanate directly from the king, and ... the power of revoking them, so far as they could be revoked at all, was in the king, and was exercised by him as a personal privilege. This mode of revoking patents, however, seems to have fallen into disuse; and the same end was attained by the issue of writs of scire facias, in the name of the king, to show cause why the patents should not be repealed or revoked.
Id. at 360, 9 S.Ct. at 94. More specifically, as the Supreme Court noted in Ex parte Wood, a scire facias issued at common law "to repeal patents which have been obtained surreptitiously, or upon false suggestion.” 22 U.S. (9 Wheat.) 603, 609, 6 L.Ed. 171 (1824). Accord Mowry v. Whitney, 81 U.S. (14 Wall.) 434, 439, 441, 20 L.Ed. 858 (1871). The contemporary analog of the writ is thus an action for a declaration of unenforceability due to inequitable conduct, not due to invalidity. See Kingsdown Medical Consultants v. Hollister Inc., 863 F.2d 867, 876, 9 USPQ2d 1384, 1392 (Fed.Cir.1988) (in banc) (finding of inequitable conduct justified only where "the involved conduct, viewed in light of all the evidence ... indicated] sufficient culpability to require a finding of intent to deceive”), cert. denied, 490 U.S. 1067, 109 S.Ct. 2068, 104 L.Ed.2d 633 (1989).
Assuming, arguendo, that a writ of scire facias to repeal a patent is the closest 18th century analog to American’s action for a declaration of patent invalidity, the result in this case remains the same. As Blackstone noted, "the remedy to repeal [a] patent is by a writ of scire facias in chancery.” 3 Commentaries *261; accord 5 John Comyns, A Digest of the Laws of England 274-75 (Samuel Rose ed., London, A. Strahan 4th ed. 1800) ("A scire facias for repealing a patent may be sued in Chancery."). Chancery, however, exercised both legal and equitable powers: "The court of chancery is either ordinary, as a court of common law, or extraordinary, as a court of equity.” 3 A Systematic Arrangement of Lord Coke’s First Institute of the Laws of England 328 n.D (J.H. Thomas ed., London, S. *975Brooke 1818); 1 William Holdsworth, A History of English Law 449-50 (6 ed. 1938) ("We have seen that Chancery had always possessed some common law jurisdiction; and that that jurisdiction continued to exist after the common law courts had become distinct tribunals ... because of the close connexion which the Chancery had with the issue of original writs, and with the subsequent proceedings on some of these writs."). Moreover, it was in this ordinary, or common law, part of chancery that the writ of scire facias to repeal a patent was originated. Coke’s First Institute at 328 n.D; Holdsworth at 452. The ordinary part of chancery was severely limited in one noteworthy particular: “it [had] no power to summon a jury.” Coke’s First Institute at 328 n.D. Thus, in a scire facias raising genuine issues of material fact, the proceeding in chancery was suspended pending a determination by a jury summoned in the Court of King's Bench, the main law court. As Lord Coke wrote in his Fourth Institute,
"If the parties descend to issue, this court (the Chancery) cannot try it by jury, but the Lord Chancellor ... delivereth the record by his proper hands into the King’s Bench to be tried there ... and after trial had, to be remanded into the Chancery, and there judgment to be given.”
Holdsworth at 452 (quoting Coke, Fourth Instit. 80). A proceeding to repeal a patent by the writ of scire facias was, with respect to the factual issues raised therein, a legal, rather than an equitable, affair, thereby entitling the parties to a jury as of right. Cf. Hollister v. United States, 145 F. 773, 780-83 (8th Cir.1906) (judgment in a scire facias for a forfeited recognizance reversed and remanded for a jury trial, one having been denied defendants in violation of the Seventh Amendment); Theodore F. Plucknett, A Concise History of the Common Law 392 n. 2 (5th ed. 1956) ("There seem no grounds for the suggestion ... that there is anything 'equitable' about scire facias.").
. Our analogy to an inverted action for patent infringement finds support among a variety of commentators. See, e.g., 5 Donald S. Chisum, Patents § 20.03[4][c][vi] at 20-428 n. 109 (suit for declaratory judgment of invalidity "is in substance an infringement suit with the parties initially reversed”); 6A James W. Moore et al., Moore’s Federal Practice ¶ 57.20 at 57-213 ("A declaratory action brought by the accused in-fringer is for the purpose of securing a judicial determination of plaintiff's immunity from the operation of the patent laws — not to assert rights provided by those laws.... The issues sought to be adjudicated are precisely the same as in an infringement suit[.]”).
The Supreme Court's recent decision in Cardinal is not to the contrary. In Cardinal, the Court reviewed and rejected our practice of "routinely vacating declaratory judgments regarding patent validity following a determination of noninfringement.” - U.S. at -, 113 S.Ct. at 1971. The Court held that the affirmance of a district court’s finding of noninfringement does not, by itself, moot the question of validity. Id. at -, 113 S.Ct. at 1978. Thus, for purposes of mootness, "[a] party seeking a declaratory judgment of invalidity presents a claim independent of the patentee’s charge of infringement." Id. at -, 113 S.Ct. at 1975. Viewed, however, from the perspective of Article Ill's jurisdictional requirement of a case or controversy, the two claims are intimately related: "If ... a party has actually been charged with infringement of the patent, there is, necessarily, a case or controversy adequate to support jurisdiction of a complaint, or a counterclaim, under the [Declaratory Judgments] Act.” Id.
. Numerous commentators have recommended this “inverted lawsuit” approach to the particular quandaries of the Seventh Amendment historical analysis as applied to declaratory judgment actions. Borchard at 400; George B. Fraser, Jury Trials in Declaratory Judgment Actions, 52 Iowa L.Rev. 609, 617 (1967); Fleming James, Right to a Jury Trial in Civil Actions, 72 Yale L.J. 655, 685-86 (1963); John C. McCoid, Procedural Reform and the Right to Jury Trial: A Study of Beacon Theatres, Inc. v. Westover, 116 U.Pa.L.Rev. 1, 20 (1967); Zachary Shimer, Comment, Jury Trials in Declaratory Relief Actions: The *976Right Exists, but Under What Circumstances?, 6 UCLA L.Rev. 678, 682, 692 (1959); John M. Townsend, Comment, Right to Trial by Jury in Declaratory Judgment Actions, 3 Conn.L.Rev. 564, 597-98 (1971).
. In 1790, before the adoption of the Seventh Amendment in 1791, the patent statute in this country provided only for the award of damages in an action at law, with the right to a trial by jury. See Root, 105 U.S. at 191-92; 5 Chisum § 20.02. The patentee's right to seek an injunction in non-diversity federal suits was not added to the patent statute until 1819. See Root, 105 U.S. at 192; 5 Chisum § 20.02[1],
. One case cited by American, Filmon Process Corp., 379 F.2d at 451-52, involved a claim for injunctive relief for patent infringement, not an action for a declaratory judgment of invalidity. It has nothing to teach on the question we consider here.
. Cf. Root, 105 U.S. at 205 (Patent Act of 1870 "proceeds upon the idea that the court of equity having acquired jurisdiction for the purpose of administering the equitable relief [against alleged infringement] sought by the bill, may determine directly and for itself, in the same proceeding, all questions incidental to the exercise of its jurisdiction, notwithstanding they may be questions affecting legal rights and legal titles.”); Cochrane v. Deener, 94 U.S. 780, 782-83, 24 L.Ed. 139 (1876) (patentee is not compelled to sue at law to establish the validity of his patent in that forum as a condition precedent to obtaining equitable relief).
.Dairy Queen thus overrules Cochrane and Root, albeit sub silentio, to the extent that they rely on this principle of equity.
. If equitable, the order would not have been immediately appealable according to the doctrine of Enelow v. New York Life Ins. Co., 293 U.S. 379, 55 S.Ct. 310, 79 L.Ed. 440 (1935), and Ettelson v. Metropolitan Life Ins. Co., 317 U.S. 188, 63 S.Ct. 163, 87 L.Ed. 176 (1942). The Supreme Court overruled the Enelow Ettelson doctrine after Diematic was decided. Gulfstream Aerospace Corp. v. Mayacamas Corp., 485 U.S. 271, 287, 108 S.Ct. 1133, 1142, 99 L.Ed.2d 296 (1988).
. The same is true of the other Supreme Court cases American cites for the proposition that "declaratory relief is ordinarily equitable in nature.” All the cases American cites concern the discretionary nature of the decision to grant declaratory relief in a particular equitable cause of action rather than the Seventh Amendment right to a jury trial. See Samuels v. Mackell, 401 U.S. 66, 70-71, 91 S.Ct. 764, 766-67, 27 L.Ed.2d 688 (1971); Abbott Lab. v. Gardner, 387 U.S. 136, 155, 87 S.Ct. 1507, 1519, 18 L.Ed.2d 681 (1967); Public Affairs Assocs. v. Rickover, 369 U.S. 111, 112, 82 S.Ct. 580, 581-82, 7 L.Ed.2d 604 (1962); Eccles v. Peoples Bank, 333 U.S. 426, 431, 68 S.Ct. 641, 644, 92 L.Ed. 784 (1948).