Grip Nut Co. v. MacLean-Fogg Lock Nut Co.

SPARKS, Circuit Judge.

This is an appeal from a decree of the District Court of the United States for the-' Northern District of Illinois dismissing the bill of appellant for want of equity. The controversy is the usual one arising where infringement of patent is charged. The patent alleged to have been infringed, invented by William E. Sharp for “Improvement in Lock-Nuts and Processes of Making the Same,” is No. 1,271,782, and was granted to appellant July 9, 1918. The defenses presented were invalidity of the so-called Sharp patent and no-ninfringement. Tho lower court held there was…