Contributory infringement

The intentional hiding of one person by another in the unlawful making or selling of a patented invention; usually done by making or selling one part of the patented invention, or one element of the combination, with the intent and purpose of so aiding.

Thomson-Houston Electric Co., v. Specialty Co. (C. C.) 72 Fed. 1016 ; Shoe Mach. Co. v. Jackson, 112 Fed. 146, 50 C. C. A. 159, 55 L R. A. 692; Thomson-Houston Electric Co., v. Ohio Brass Co., 80 Fed. 712 , 26 C. C. A. 107; Stud Go. y. O'Brien (a G.) 93 Fed. 203.