Welsbach Light Co. v. Sunlight Incandescent Gas Lamp Co.
U.S. Circuit Court for the District of Southern New York
This was a suit in equity by the Welsbach Light Company against the Sunlight Incandescent Gas Lamp Company tor alleged infringe* ment of a patent.
1Opinion of the Court
TOWNSEND, District Judge.
The questions herein presented at final hearing on bill and answer relate to the first claim of patent No. 407,963, granted July 30, 1889, to Frederick Lawrence Rawson and William Stepney Rawson for “production of incandescent mantles,” and assigned to complainant. Prior to the discussion of the issues directly involved, it will be necessary to briefly describe the Welsbach light: In 1885, Dr. Carl Auer von Welsbach discovered or invented the mantle of the incandescent light which bears his name. Prior to that date it was known that certain rare earths, when heated to…
2Cited by13 opinions
- Donner v. Sheer Pharmacal CorporationCourt of Appeals for the Eighth Circuit · 1933
- Welsbach Light Co. v. Cosmopolitan Incandescent Gaslight Co.U.S. Circuit Court for the Northern District of Illnois · 1900
- Welsbach Light Co. v. Cosmopolitan Incandescent Light Co.Court of Appeals for the Seventh Circuit · 1900
- Welsbach Light Co. v. American Incandescent Lamp Co.Court of Appeals for the Second Circuit · 1899
- Minnesota Mining & Manufacturing Co. v. Technical Tape Corp.District Court, N.D. Illinois · 1961
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