American Chain Co. v. Cox Brass Mfg. Co.

DONAHUE, Circuit Judge.

This appeal involves the validity, and, if valid, the infringement of claims 6 to 11, inclusive, of United States letters patent No. 1,374,893, issued April 12, 1921, to Pancoast and Grotenhuis. The District Court found all of these claims invalid for *33want of invention and entered a decree dismissing the bill of complaint. 292 Fed. 624.

The patent in suit relates to bumpers of the type that are used on automobiles, either at the front or rear, to receive and absorb the shock of collision and to prevent damage to the vehicle. The object of the claimed invention is to…