Automotive Parts Co. v. Wisconsin Axle Co.

MOORMAN, Circuit Judge.

The patents in suit, Nos. 1,571,801 and 1,730,900, are combination patents rélatiijg to an automobile axle. The appellee, as owner of the patents, makes and sells, without restriction, the patented structures. Among the parts of each of the structures are beveled gear pairs and a wheel driving shaft, neither of which is patented. ^ The appellant makes and sells gears and driving shafts designed for use in appellee’s axles, This is a suit for contributory infringement of the patents resulting from the appellant’s selling such parts. The defenses are invalidity and…