Legal Opinion
Keystone Driller Co. v. Northwest Engineering Corp.
Supreme Court of the United States
Decided January 7, 1935No. Nos. 131—133PublishedCited by 67 opinions
1Opinion of the CourtJustice Roberts
The petitioner brought suit against each respondent in the District Court for Eastern Wisconsin, charging infringement of claim 4 of the Clutter patent, No. 1,317,431, claims 6 and 7 of the Wagner patent, No. 1,476,121, and claims 6 and 9 to 14, inclusive, of the Downie patent, No. 1,511,114. The suits were consolidated and the court found that the claims were valid and infringed. The Circuit Court of Appeals concluded that none of the respondents’ machines infringed claim 4 of the Clutter patent, and that the specified claims of the Wagner and Downie patents were invalid for lack of…
2Cases cited12 opinions
- Keystone Driller Co. v. General Excavator Co.Supreme Court of the United States · 1933
- I. T. S. Rubber Co. v. Essex Rubber Co.Supreme Court of the United States · 1926
- Shepard v. CarriganSupreme Court of the United States · 1886
- Grinnell Washing MacHine Co. v. E. E. Johnson Co.Supreme Court of the United States · 1918
- Smith v. Magic City Kennel Club, Inc.Supreme Court of the United States · 1931
7 more not listed; retrieve them via the Exa API.
3Cited by67 opinions
- Warner-Jenkinson Co. v. Hilton Davis Chemical Co.Supreme Court of the United States · 1997
- Festo Corp. v. Shoketsu Kinzoku Kogyo Kabushiki Co.Supreme Court of the United States · 2002
- Autogiro Company of America v. The United StatesUnited States Court of Claims · 1967
- Festo Corporation v. Shoketsu Kinzoku Kogyo Kabushiki Co., Ltd., A/K/A Smc Corporation, and Smc Pneumatics, Inc.Court of Appeals for the Federal Circuit · 2000
- Builders Concrete, Inc. v. Bremerton Concrete Products CompanyCourt of Appeals for the Federal Circuit · 1985
62 more not listed; retrieve them via the Exa API.