Westinghouse Electric & Mfg. Co. v. Electric Appliance Co.
U.S. Circuit Court for the Northern District of Illnois
In Equity. Suit for infringement of letters patent Nos. 511,559 and 511,560, for electrical transmission of power and an electric motor, granted to Nikola Tesla December 26, 1893. On motion for preliminary injunction.
1Opinion of the Court
KOHLSAAT, District Judge.
This cause comes now on to be heard Upon complainant’s motion for an injunction pendente lite restraining *397defendant from infringing letters patent Nos. 511,559 and 511,560. The inventions relate to the operation of rotating field motors upon a single alternating current circuit, under what is known as the Tesla split-phase system, applied in the present case to the operation of electric motors. The former patent covers the method of operating the motors, while the latter covers the means for so doing. The inventions may be said to consist in splitting the current, at…
2Cases cited6 opinions
- Westinghouse Electric & Mfg. Co. v. RobertsDistrict Court, E.D. Pennsylvania · 1903
- Westinghouse Electric & Mfg. Co. v. Catskill Illuminating & Power Co.Court of Appeals for the Second Circuit · 1903
- Westinghouse Electric Mfg. Co. v. New England Granite Co.Court of Appeals for the Second Circuit · 1901
- Westinghouse Electric & Mfg. Co. v. Mutual Life Ins.U.S. Circuit Court for the District of Western New York · 1904
- Westinghouse Electric & Mfg. Co. v. New England Granite Co.District Court, D. Connecticut · 1900
1 more not listed; retrieve them via the Exa API.
3Cited by1 opinion
- Westinghouse Electric & Mfg. Co. v. Stanley Instrument Co.Court of Appeals for the First Circuit · 1904