SIMONS, Circuit Judge.
The patent in suit, McDonald 1,661,572, is in the art of folding sheet materials as practiced in the shoe manufacturing industry. In a suit for infringement the appellant, as owner of the patent, sought to hold the Irving Drew Company liable as a direct and the O'Donnell Rubber Products Company as a contributory infringer. The court below found none of the claims of the patent infringed, and so, without decision upon their validity, entered...
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