MR. JUSTICE STONE delivered the opinion of the Court.
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...
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