This is an appeal from a judgment of the District Court invalidating Robinson and Moore patents Nos. 2,222,555 and 2,-222,556 and Frederickson patent No. 1,-828,772, and dismissing a counter-claim for infringement.
Plaintiff brought suit seeking a declaratory judgment to invalidate the Robinson and Moore and other patents and defendant brought a counter-claim seeking damages for infringement. The District Court *88concluded that six of the patents were- invalid and defendant now appeals to this court from that portion of the judgment invalidating Robinson and .Moore patents Nos. 2,222,555 and 2,222,556 and Frederick-son patent No. 1,828,772.
The sole issue presented is patentability since it is evident that the patents, if valid, are infringed. The patents are owned by National Electric Products Corporation, hereafter referred to as “National”, and the alleged infringer is Triangle Conduit and Cable Company, Inc., hereafter referred to as “Triangle”. The Robinson and Moore patents, pertaining to fibrous covered rubber insulated electrical building wire, will be considered together since the second patent describes the same combination but in a specific improved form. Theroz Co. v. United States Industrial Chemical Co., D.C., 14 F.2d 629.
Electrical wire used in the interior wiring of buildings is covered by a rubber compound to insulate the electrical current and maintain its flow within the wire circuit. It is essential that the rubber insulation be preserved intact and protected from the injurious effect of light, air and moisture. To provide this protection the rubber insulation is enclosed in a cotton j acket which is impregnated with an asphaltic compound, then coated with a pitch material, and finally waxed on the exterior. The cotton j acket protects the rubber from knocks, blows and kinks which are encountered during installation of the wire and, in addition, provides a base for the protective coatings of pitch and wax.
For many years the standard cotton jacket was a braided fabric. It provided ideal protection for the wire under the most severe kinking and stresses but it was not economical. Its application was slow since the threads were interlaced around the wire by a braiding machine consisting of two circles of spools mounted on carriers turning in opposite directions about the wire which was drawn up through the machine. The overlapping of threads was wasteful of cotton and the final product was of uneven thickness.
The electric wire industry had developed another form of jacket known as a “serving” consisting of cotton threads spirally wrapped on the wire in one direction only, with parallel turns laid, close together without overlap at a substantial angle. The serving overcame all the economic disadvantages of the braided jacket. It could be applied quickly in an even layer without waste of material. But it had a tendency to separate and expose the rubber covering when the wire was subjected to a sharp bend, and this basic defect precluded adoption of the serving as a standard approved covering for wire.
For over twenty-five years the art addressed .itself to the problem of eliminating the separating tendency of the serving. McCulloch patent No. 1,216,337 of 1917 proposed a serving interlaced with threads running lengthwise or helically. It failed to solve the problem in that it was basically a braiding operation and had similar economic disadvantages. In 1926 Western Electric Company developed Lamplough patent No. 1,610,954 which prescribed application of the serving before the rubber covering was vulcanized, the whole to be drawn through a hot bath or saturating compound so that the threads of the serving would become firmly attached to the softened rubber. The process failed to keep the serving in place when the wire was kinked and Western Electric returned to the use of an improved braided jacket. Frederickson patent No. 1,900,492 issued to National in 1933-paralleled the Western Electric scheme of adhesion and proposed a saturant of stearin, pitch to induce firm attachment of the serving to the rubber. The adhesion was insufficient to prevent separation of the serving and the patent was rejected by the Underwriters’ Laboratories.
The Robinson and Moore patents of 1937' successfully solved the problem which had' confronted the art by combining a new counter-wound locking thread with the-traditional spiral serving. The first claim, of the patent contains the following description :
“1. An insulated conductor structure-having a flexible metallic conductive element, and inner insulating structure and an outer protective jacket in the form of a filamentary insulating serving surrounding the said metallic conductive element with the turns of said serving lying against each other in a simple helical lay to form a closed wrapping, and a locking filament laid in a helix opposite in sense to the helix of the closed wrapping and disposed in the assembly outside and in contact with the said wrapping, said locking filament being-laid with its turns out of contact with each, other in an open binder structure and arranged each to form an angle approximate*89ly as great as 60° with the longitudinal axis of the conductor.”
The spiral serving and counter-wound 'locking thread could be applied rapidly and cheaply and easily satisfied the economic goal sought by the art. Although inferior in many respects to the braided jacket, it provided an adequate protective covering for rubber insulated building wire and was •approved by the National Board of Fire Underwriters. Competing manufacturers, with the notable exceptions of Western Electric Company and Triangle, entered into licensing agreements with National. The licensed manufacturers and Triangle, which was not a licensed company, began production of the Robinson and Moore wire and the product achieved immediate commercial success.
The basic contention asserted by Triangle is that the Robinson and Moore ■patents are anticipated by Roberts patent No. 242,911 (British). One of the prerequisites of a patentable invention is that it must be new or novel. • The Roberts patent effectively negatives any novelty in the Robinson and Moore patents and is :lealdy an anticipation thereof.
The Robinson and Moore patents describe ■a serving consisting of threads wound helically around a rubber covered wire to form a closed but non-overlapping covering which is secured by a widely spaced “binder thread oppositely wound at about a 60 degree angle to the longitudinal axis of the conductor. The threads which form the wrapping or serving are described as “fiber threads of moisture resistant character such as cotton, lint, hemp or paper thread”. (Italics supplied). The use of a serving has been advocated by the art for some twenty-five years; but the patentable feature claimed is the use of oppositely wound locking cord which prevents separation of the serving when the conductor is bent or kinked.
The Roberts patent describes an improved, paper insulated, electric cable. The cable is covered by insulating strips or tapes of paper wrapped around the cable at an angle “approaching parallelism” with the longitudinal axis of the conductor. A widely spaced binding of paper, cotton tape or thread is oppositely wound around this layer at an angle which is not described but which appears, in the diagram, to be a slightly larger angle with the longitudinal axis than the 60 degree angle of the binder thread in the Robinson and Moore patent. Another layer of paper, wound m the opposite direction, together with another binder thread, provides double insulation; the whole is then enclosed in a leaden sheath.
The paper covering layer in the British patent is a spirally wrapped insulator which is similar to the Robinson and Moore serving except that it lays at a slightly different angle and has a greater thickness. Both patents permit the use of paper as a wrapping material, but the American patent also permits the use of cotton, lint and hemp. Although the Roberts patent does not describe the wrapper as a “serving”, it must be the prior device itself and not merely the words by which it is described or the scope of the claim which provides the measuring rod of anticipation. Minerals Separation North American Corporation v. Magma Copper Co., 280 U.S. 400, 50 S.Ct. 185, 74 L.Ed. 511; Lanyon v. M. H. Detrick Co., 9 Cir., 85 F.2d 875.
National contends that the Robinson and Moore patents present an entirely different co-action of elements from that indicated in the Roberts patent. Specifically, the contention is made that the binder thread in the British patent combats the internal expanding force of a thick paper wrapper, whereas the binder thread of the American patent is intended to combat the separating force on the serving caused by a sharp bend or kink in the conductor.
We cannot agree with this contention. It is true that Roberts did not assert that his binder thread would prevent separation of the spiral paper wrapper if the cable was sharply bent. But that problem was not before him. He was experimenting with a heavy, lead sheathed cable which was not subjected to bends or kinks. It is a fair inference that if the heavy cable had been kinked, the binder thread described by Roberts would have prevented separation of. the paper wrapper just as the Robinson and Moore binder prevents separation of the serving. The identical co-action must have been present. Either Roberts did not realize this fact' or he did not perceive any value in describing this co-action of forces when it had so little direct relation to a heavy cable. It is of no significance that Roberts made no mention of the particular forces which his binder thread would combat or even that he did not appreciate that the binder thread would prevent separation of the spiral wrapper *90when subjected to a bending force. Floridin Co. v. Attapulgus Clay Co., 3 Cir., 125 F.2d 669. Nor can the scope of his patent be diminished by his failure to describe sufficiently the scientific principles under which it operates. Smith, Executor, v. Hall, 301 U.S. 216, 57 S.Ct. 711, 81 L.Ed. 1049. The inventor is entitled to whatever merits his invention has, even though they may be greater than he supposed.
Although it is true that the Robinson and Moore patents solved a long standing problem of the art, the only flash of genius to which they can be ascribed is the realization that an existing patent could be applied to a new and perplexing problem. But the observation of a new use in a prior patented device is not patentable; and the mere fact that the inventor did not use his device for that purpose or did not foresee that the purpose nr'ght be useful is immaterial. Mathews Conveyor Co. v. Palmer-Bee Co., 6 Cir., 135 F.2d 73. The discovery that the Roberts binder thread possesses an unexpected advantage and accomplishes an unexpected result did not entitle Robinson and Moore, who pointed out that fact, to a patent. Red River Refining Co. v. Sun Oil Co., D.C.E.D.Pa., 29 F.Supp. 636, affirmed in 3 Cir., 112 F.2d 575 on the opinion of. the District Court; Grand Rapids Refrigerator Co. v. Stevens et al., 6 Cir., 27 F.2d 243. The application of an old patent to a new use is not patentable. Paramount Publix Corporation v. American Tri-Ergon Corporation, 294 U.S. 464, 55 S.Ct. 449, 79 L.Ed. 997.
Commercial success of the Robinson and Moore patents cannot be doubted and that factor would ordinarily be persuasive evidence of patentability. Electric Machinery Mfg. Co. v. General Electric Co., 2 Cir., 88 F.2d 11, certiorari denied 301 U.S. 702, 57 S.Ct. 932, 81 L.Ed. 1357. But in the present case, the success of the new patent was, in no sense, a recognition of an improvement in the art. The Robinson and Moore patent was the cheapest rubber covered building wire approved by the National Board of Fire Underwriters. Competing manufacturers, dealers and contractors had to adopt this cheap wire lest they find themselves unable to meet competition; and this was true regardless of the admitted fact that the Robinson and Moore wire was inferior in every respect save cost to the braid covered wire which had heretofore been used. Generally, the only specification of quality required of an electrical installation is that it satisfy the Underwriter Standard and, to make the lowest bid, the electrical contractor must buy the cheapest wire approved by the Underwriters. Therefore, commercial success was a direct result of Underwriter approval, but the approval by the Underwriters indicated only that the wire met a standard of safety and not that it was novel or patentable. Whatever may be the significance of Underwriter approval it is sufficient to point out that commercial success is decisive only where the question of invention is in doubt (Textile Machine Works v. Louis Hirsch Textile Machines, Inc., 302 U.S. 490, 58 S.Ct. 291, 82 L.Ed. 382) ; but not where it is clear that invention is lacking (Pfanstiehl Chemical Co. v. American Platinum Works, 3 Cir., 135 F.2d 171) or there is anticipation. Marconi Wireless Telegraph Co. of America v. United States, 320 U.S. 1, 63 S.Ct. 1393, 87 L.Ed 1731.
Frederickson patent No. 1,828,-772 describes a crumpled paper armor for individual conductors or non-metallic sheathed cable. The novelty upon which the patent relies is the use of soft compressible paper strands, wrapped spirally around an insulated conductor so that their edges overlap. McCracken patent No. 459,-378 shows the use of twisted ribbons of paper spirally wound upon an electric conductor surrounded by an insulating compound. If not completely anticipated by the McCracken patent, the Frederickson patent shows no patentable advance over prior art merely by substituting crumpled paper for soft compressible^ paper strands. Atlantic Works v. Brady, 107 U.S. 192, 2 S.Ct. 225, 27 L.Ed. 438.
For the reasons stated, the judgment below will be affirmed.