DeForest Radio Co. v. General Electric Co.

Certiorari was granted, 282 U. S. 836, to review a judgment of the Court of Appeals for the Third Circuit, holding the Langmuir Patent, No. 1,558,436, granted October 20,1925, for “ electrical discharge apparatus and process of preparing and using the same,” valid, and infringed by petitioners. The District Court for Delaware, in which respondent, the assignee of the patent, brought suit for infringement, held the patent invalid for want of invention, and because of prior use and prior invention, and gave judgment dismissing the complaint, 23 F. (2d) 698, which the Appellate Court at first…