Legal Opinion
Union Switch & Signal Co. v. Kodel Electric & Manufacturing Co.
Court of Appeals for the Sixth Circuit
Decided January 7, 1932No. 5789, 5790PublishedCited by 8 opinions
1Opinion of the Court
MOORMAN, Circuit Judge.
This is a suit for infringement of the Grondahl patent, No. 1,640,335, for an “unidirectional current-carrying device.” The plaintiffs are Union Switch & Signal Company, the owner of the patent, and Westinghouse Electric & Manufacturing Company. The Westinghouse Company and General Electric Company are licensees in the field in which the defendant operates. The defendant is the Kodel Electric & Manufacturing Company, which is engaged in manufacturing and selling, among other things, electric current rectifiers. On the trial below the court held claims 10 to 14,…
2Cases cited10 opinions
- Dolbear v. American Bell Telephone CompanySupreme Court of the United States · 1888
- Permutit Co. v. Graver Corp.Supreme Court of the United States · 1931
- Hildreth v. MastorasSupreme Court of the United States · 1921
- Holland Furniture Co. v. Perkins Glue Co.Supreme Court of the United States · 1928
- Permutit Co. v. WadhamCourt of Appeals for the Sixth Circuit · 1926
5 more not listed; retrieve them via the Exa API.
3Cited by8 opinions
- Aluminum Co. of America v. Thompson Products, Inc.Court of Appeals for the Sixth Circuit · 1941
- Linde Air Products Co. v. Graver Tank & Mfg. Co.District Court, N.D. Indiana · 1947
- Bettis v. Patterson-Ballagh CorporationDistrict Court, S.D. California · 1936
- In Re LangmuirCourt of Customs and Patent Appeals · 1932
- Jensen-Salsbery Laboratories, Inc. v. O. M. Franklin Blackleg Serum Co.Court of Appeals for the Tenth Circuit · 1934
3 more not listed; retrieve them via the Exa API.