Sasser v. Senco Products, Inc.

Senco Products, Inc., appellee, sued appellants for direct infringement of its patents for staplers; for contributory infringement; for inducing infringement thereof; and for unfair competition. Appellants defended on the ground that the patents in issue were invalid; that they had only sold repair parts of *566the patented devices; that appellee had been guilty of misuse of its patents by its intentional delay in supplying repair parts to users of appellee’s device; and that there was no properly admissible evidence to sustain appellee’s claim that appellants had been guilty of unfair…