General Motors Corp. v. Deppe

BUFFINGTON, Circuit Judge.

Having duly considered the mass of testimony in thib record, the conflicting contentions of the experts, the detailed discussion in the briefs of the large number of questions which it is urged are here involved, and the comprehensive opinion of the court below, we have reached the conclusion that the ease resolves itself into comparatively narrow limits. The important patent here involved,is No. 1,-335,665, granted March 30, 1920, to William *45P. Doppe, for an internal combustion engine. That general field has been thoroughly exploited, due to the fact of the…