Legal Opinion
De Forest Radio Telephone & Telegraph Co. v. Westinghouse Electric & Mfg. Co.
District Court, E.D. Pennsylvania
Decided June 15, 1924No. 3125PublishedCited by 11 opinions
1Opinion of the Court
THOMPSON, District Judge.
This is a suit in equity brought by the plaintiff (as assignee of patents Nos. 1,507,016 and 1,507,-017, both granted September 2, 1924, to Lee De Forest, against the defendant as assignee of patent No. 1,113,149, granted October 6, 1914, to Edwin H. Armstrong. The bill alleges that the plaintiff’s patents and the defendant’s patent are interfering patents within the meaning of section 4918, R. S. (Comp. St. § 9463), in that the invention of the Armstrong patent No. 1,113,149 and the inventions of the De Forest patents Nos. 1,507,016 and 1,507,017 are the same, or…
2Cases cited11 opinions
- The Barbed Wire PatentSupreme Court of the United States · 1892
- Morgan v. DanielsSupreme Court of the United States · 1894
- Cantrell v. WallickSupreme Court of the United States · 1886
- John Simmons Co. v. Grier Brothers Co.Supreme Court of the United States · 1922
- Armstrong v. De Forest Radio Telephone & Telegraph Co.Court of Appeals for the Second Circuit · 1922
6 more not listed; retrieve them via the Exa API.
3Cited by11 opinions
- Nieman v. Plough Chemical Co.Court of Appeals for the Sixth Circuit · 1927
- Pennsylvania Turnpike Commission v. McGinnesDistrict Court, E.D. Pennsylvania · 1958
- Crayne v. CrayneNevada Supreme Court · 1932
- Joseph T. Ryerson & Son, Inc. v. Bullard Machine Tool Co.Court of Appeals for the Second Circuit · 1935
- Radio Corp. v. Radio Engineering Laboratories, Inc.Court of Appeals for the Second Circuit · 1933
6 more not listed; retrieve them via the Exa API.