WILSON, Circuit Judge.
This is an appeal from a decree of the District Court of Massachusetts in equity granting a perpetual injunction restraining the appellant from infringing a patent for a stocking protector, issued to the appellees May 15, 1928, and numbered 1,669,790. The parties will hereinafter be referred to as plaintiffs and defendant.
The District Court held that the patent issued to- the plaintiffs was valid as to each of its three claims, and that the defendant had infringed the same, and awarded a perpetual injunction against the defendant and ordered an accounting".
A counterclaim was filed by the defendant to the effect that the manufacture of stocking protectors under the plaintiffs’ patent, which will be hereinafter referred to as the Sheridan patent, was an infringement of a patent issued to one Weston in 1920, hereinafter referred to as the Weston patent, which was acquired by the defendant after the plaintiffs’ bill was brought. The counterclaim was dismissed by the court on the ground of no
[936] infringement. ' If the Sheridan patent "was. valid, as the court held, an article made pursuant thereto could not he an infringement of the Weston patent. On the contrary, it is now admitted by the defendant that, if the Sheridan patent is valid, there was infringemcnt by the defendant, since it has sold stocking protectors made in accordance with the claims under the Sheridan patent.
The utility of the Sheridan patent at the outset was also denied, but it is now conceded that, if there is sufficient commercial success of a stocking protector constructed in accordanee with the claims of the Sheridan patent, and the defendant has imitated it, the defendant is estopped to deny its utility. Gandy V. Main Belting Company, 143 U. S. 587, 13 S. Ct. 598, 36 L. Ed. 273; Lehnbeuter v. Holthaus, 105 U. S. 94, 36 L. Ed. 939; Boyce et al. v. Stewart-Warner Speedometer Corp. (C. C. A.) 220 F. 118; Walker on Patents, vol. 1, § 129.
The only issue left is whether the Sheridan patent is valid which involves the issue of its patentability and whether it was anticipated by the Weston patent, or the Eliason and Ziegler patent No. 1,1221,884, or by the prior art as disclosed by the evidence.
As between the Sheridan and the Weston patent, we start with the proposition, as the District Court so aptly pointed out, that the former is a patent for a stocking protector, while the latter is a patent for a heel lining for repairing shoes. While the function of a device is not patentable, the device by which it functions is patentable, if it constitutes an advance over the prior art and has both novij. n xm-x ^
, The plaintiffs’ stocking protector under its patent is formed of two pieees, usually of soft, flexible leather, with a base shaped to conform to the bottom of the heel of the foot ■ and rounded at the rear end. The side wall is semielliptical in shape, coming at each end to a point. The upper edge, when completed, constitutes a uniform curve, having the same radius throughout its entire length, while the bottom edge is also cut on a uniform curve throughout the entire length, but on a longer radius than the upper edge, and is sewed or fastened to the base. The relation of the radii of the curve of the upper and lower edges is such that, when fastened to the base, the part of the side wall at the hack of the heel is brought forward over the base at an angle of approximately 45 degrees, hut the side walls are forced outward. When the protector thus constructed is forced on the heel of the foot and the rear wall is brought into close contact with the contour of the heel, the rear wall is brought substantially into a vertical position, and the side walls on both sides are drawn inward, gripping the sides of the heel and thus preventing its slipping on the foot, and resulting in the stoeking being held firmly within the protector, and, if there is any movement of the foot within the shoe, as there inevitably is some in talking, the protector receives all the fric^lon ^-ro:n:L contact with the beel lining1 o£ the shoe and thus saves the sheer, thin silk stoekings now worn by ladies from wear due to contact with the heel lining of the shoe,
The claims of the Sheridan patent read as follows :
“1. A stocking protector comprising two pieces of flexible material secured together, one constituting a base and the other a side wall of an article in which the rear of the side wall normally inclines forwardly and overlies the base and the lateral portions of the side wall bow outwardly from the base an,i when the rear portion of the side wall is moved to a substantially vertical position at>out its line of attachment to the base, the lateral portions of the side wall are drawn upwardly and their upper edges turn inwardly so as to overlie the base for tightly gripping, the sides of the heel of a wearer,
, , . 2‘ ^ Protector comprising two *?ieces °* fl«?bLe material seemed together, one constituting a base and the other a side wall> ^ “ artlde m which tha rear of the Slde1 wab T fmrdl7 a* an ^gle of substantially 45 degrees and overhcf ^e base and the lateral portions of the side wall how outwardly froia the base and when the rear portion of the side wall is moved to a substantially vertical position about its line of attachment to the base the lateral portions of the said wall are drawn upwardly and their upper edges turn inwardly so as to overlie the base for tightly gripping the sides of the heel of a wearer,
, , , “3- A stocking protector composing a bf3 f^tantially conforming to the bottom °f a beel of a afd a section ba™£ an »PPe? aild a lowf ed/?> b°tb f wbldl are curved, the lower edge being stitched *° tb* ,ed§^of tbe bas® Pr°dfe a“ artl' de 111 which the rear portion of the side sectmn normally inclines forwardly and overlies base and lateral portions of the side seetlon bw outwardly away from the base.”
The claims of the Weston patent which the defendant claims the Sheridan patent infringes, and which the Weston patent antieipates, read as follows:
[937] “1. A heel lining comprising a lied seat and a counter portion secured at its lower edge to- said heel seat; said counter portion being normally at an acute angle to said heel seat along the curved edge of said heel seat.
“2. A heel lining comprising a heel seat and a counter portion; said counter portion being normally at an acute angle to said heel seat at the rear portion thereof and having a straight upper edge adapted to be stitched to the shoo coincident with the vamp stitching.
“3. The combination with a boot or shoe of a repair heel lining- arranged in the heel portion of said boot or shoe over the usual lining; said repair lining having a straight upper edge stitched to the upper of said boot or shoe by stitching substantially coincident with the vamp stitching.”
While the first claim of the Weston patent is fairly broad as to the form which, the counter portion may take, If interpreted in connection with the specification and the accompanying drawings, and the purpose for which the device is designed and used, it can only take such form a “.will “present an upper edge adapted to he secured to the shoe coincident with the vainp stitching so that the ends are straight.” Otherwise the article described in the claim, being limited to- a heel lining, would not bo workable as such.
The salient feature of the Weston patent is the shape of the counter portion so that the back will fit snugly into- the bulge in the ( heel part of the shoe and the sides may bo attached to the counter of the shoo so that they will not wrinkle or additional seams appear on the outside of the shoe. The drawings 'of the Weston heel lining as shown in the defendant’s brief are quite different from those accompanying Weston’s application; and the drawings of the plaintiffs’ stocking protector, as shown in the defendant’s brief, are quite different from those presented with the plaintiffs’ application for a patent for a stocking protector.
Upon the evidence and findings of the District Court, the utility of the plaintiffs’ stocking protector cannot bo questioned. Novelty is also a question of i'aet, and on this point the Disiriet Court found in favor of the plaintiffs.
It is true that the plaintiffs’ device is simple, hut that does not militate against its patentability. Expanded Metal Company v. Bradford, 214 IT. S. 366, 29 S. Ct. 652;, 53 L. Ed. 1034; Diamond Rubber Company v. Consolidated Rubber Tire Company, 2-20' U. S. 428, 31 S. Ct. 444, 55 L. Ed. 507.
While its commercial success alone does not establish its novelty, it has some weight in ease of doubt, when it is sold in competition with other devices designed for the same purpose and at a higher price, which the evidence shows was the fact in this ease, Krementz v. S. Cottle Co., 148 U. S. 556-, 13 S. Ct. 719; 37 L. Ed. 558, as does the fact that the defendant has infringed it, Trico Products, Corp. v. Apco-Mossberg Corp. (C. C. A.) 45P. (2ld) 594.
It is contended that the Weston patent for a heel lining anticipated the plaintiffs’ patent, since it can be readily adap ted to be used as a stocking protector by changing the curves of the counter; and under the familiar rule that a patentee is entitled to all the uses to which his invention may bo put, whether known to him or not, if an analogous use; but a device adapted to protect a stocking and a device intended to repair heel linings are not analogous uses.
The District Judge, however, found that toe defendant’s heel lining; was not adapted to lock to the heel of the wearer and thus protect the stocking, since it was intended to be permanently fastened to toe shoe.
Defendant contends it could readily be made to lock to the heel of the wearer, hut it could be made to do so only by adopting substantially the shape and curves of the side section of the plaintiffs’ stocking protector, which constitute toe novelty of toe plaintiffs’ device and its advance over toe prior art.
The District Judge, after hearing the evidence which was more or less conflicting, found that the plaintiffs’ stocking protector was designed for the purpose of preventing wear on the heel of the stocking, and, being unattached to the shoe, it differs radically from a heel lining attached permanently to the inside of a shoe for the purpose of repair, that there was an entirely different function performed by the two articles, and tha,t the heel lining as constructed under toe Weston patent was not intended by toe inventor, nor adapted to lock to- the heel of the wearer, or to protect the heel of the stocking, and that it did not anticipate the plaintiffs’1 patent. Topliff v. Topliff et al., 145 U. S.156, 12 S. Ct. 826, 828, 36 L. Ed. 658. Trico Products Corp. v. Apco-Mossberg Corp., supra.
As toe court said in Topliff v. Topliff et al.; “It is not sufficient to constitute an anticipation that the device relied upon might, by modification, be made to- accomplish toe function performed by the patent in question, if it were not designed by its maker, nor adapted, nor actually used, for the perform
[938] anee of such functions.” Los Alaxnitos Sugar Co. v. Carroll (C. C. A.) 173 F. 280, 285; Stebler v. Riverside Heights Orange Growers' Ass’n et al. (C. C. A.) 205 F. 735; Potts v. Creager, 155 U. S. 597, 608,15 S. Ct. 194, 39 L. Ed. 275; Carnegie Steel Co. v. Cambria Iron Co., 185 U. S. 403, 433, 23 S. Ct. 698, 46 L. Ed. 968; Walker on Patents, vol. 1, § 107.
Even if the Weston device for repairing the heel lining of shoes had suggested to Sheridan and Jacobs the principles of their device of a stocking protector — which the evidence does not disclose — a combination of old elements with a new one effecting a new and beneficial result may involve patentability; and the Weston device, which Weston never claimed was adapted to be used as a stocking protector, and was not modified so as to effect that purpose before the Sheridan device was put on the1 market and proved a commercial success, cannot be said to anticipate the Sheridan patent. Loom Company v. Higgins, 105 U. S. 580; 591, 26 L. Ed. 1177; Potts v. Creager, supra; American Cone So Wafer Co. et al. v. Denaro (C. C. A.) 297 F. 913.
> ' If the device of the Sheridan patent did not infringe the Weston patent, the Weston patent could not anticipate the Sheridan patent and the counterclaim was properly dismissed. Whether the Weston patent was valid, it was not necessary to decide.
The District Court having heard and seen the witnesses, the familiar rule must be applied that his findings of fact must control here unless they appear to be clearly wrong. Adamson v. Gilliland, 242 U. S. 350, 37 S. Ct. 169, 61 L. Ed. 356; Davis v. Schwartz, 155 U. S. 631, 636, 15 S. Ct. 237, 39 L. Ed. 289; Cunningham v. Merchants’ National Bank of Manchester, N. H. (C. C. A.) 4 F.(2d) 25,41 A. L. R. 529.
We think there is no merit to the contention that the Sheridan patent was anticipated by patent No. 1,122,884 issued to Eliason and Ziegler in 1914. Proof of anticipation must be clear and cogent. Underwood Typewriter Co. v. Elliott-Fisher Co. (C. C.) 165 F. 927, 930; Deering v. Winona Harvester Works, 155 U. S. 286, 301, 15 S. Ct. 118, 30 L. Ed. 153; Kryptok Co. v. Stead Lens Co. (D. C.) 207 F. 85, 93. No previous efforts to devise a stocking protector had adopted the method of the plaintiffs to bold the protector firmly to the heel by locking the side walls to the foot as described above.
The Eliason heel guard, so-called, while designed for the same purpose as the Sheridan stocking protector, secured the result upon an entirely different principle. It was composed of two thicknesses, and relied for adherence to tlie stocking by having the inner part of the counter of the guard of rough material, which would adhere to the stocking, and the outer part of smooth material that would freely slip in the shoe. There was no principle involved in the Eliason heel guard of having the top of the sides of the protector locking on the heel by being drawn together b,y the special shape of the side walls of the protector.
Nothing in the prior art as disclosed by the evidence can be said to have anticipated the peculiar feature-of the Sheridan patent, which locks the protector to the heel of the wearer.
The decree of the District Court is affirmed, with costs, and the ease is remanded to that court for further proceedings.
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