C. O. Tingley & Co. v. Badger Rubber Works

This court said, in Damrow Bros. Co. v. Stoelting Bros. Co. (C. C. A.) 295 F. 492:

“While a patent carries with it a prima facie presumption of validity, yet that presumption does not hold if the patent is found to be invalid upon its face.”

In support of this statement, Richards v. Chase Elevator Co., 158 U. S. 299, 301, 15 S. Ct. 831 (39 L. Ed. 991), Sodemann Heat & Power Co. v. Kauffman (C. C. A.) 275 F. 593, 595, and De Vry Corporation v. Acme Motion Picture Projector Co. (C. C. A.) 262 F. 970, are cited. In the last-cited case, other authorities may be found supporting this position.

It…