Legal Opinion
Union Switch & Signal Co. v. Louisville Frog, Switch & Signal Co.
Court of Appeals for the Sixth Circuit
Decided November 16, 1934No. 6390PublishedCited by 23 opinions
1Opinion of the Court
HICKS, Circuit Judge.
The patent in suit is reissue No. 17,252 issued April 2, 1929, to Snavely and Wells and assigned to appellant. The original patent, No. 1,676,466, was granted July 10,1928, for an electrical relay, designed primarily for use in operating a flashing signal light for warning at railroad grade crossings. The defenses were invalidity as a reissue, lack of invention, and noninfringement. The District Court decreed that the patent was invalid as a reissue, holding that: “The Patent Office record, as I view it, conclusively shows that there was no such inadvertence, accident or…
2Cases cited15 opinions
- Topliff v. TopliffSupreme Court of the United States · 1892
- Miller v. Brass Co.Supreme Court of the United States · 1882
- Mahn v. HarwoodSupreme Court of the United States · 1884
- Corbin Cabinet Lock Co. v. Eagle Lock Co.Supreme Court of the United States · 1893
- Dobson v. LeesSupreme Court of the United States · 1890
10 more not listed; retrieve them via the Exa API.
3Cited by23 opinions
- Tee-Pak, Inc. v. St. Regis Paper CompanyCourt of Appeals for the Sixth Circuit · 1974
- Firestone Tire & Rubber Co. v. United States Rubber Co.Court of Appeals for the Sixth Circuit · 1935
- Trabon Engineering Corporation v. DirkesCourt of Appeals for the Sixth Circuit · 1943
- General Radio Co. v. Allen B. Du Mont Laboratories, Inc.Court of Appeals for the Third Circuit · 1942
- Ruth E. Riley v. Broadway-Hale Stores, Inc., a Corporation (Formerly Broadway Department Store, Inc., a Corporation)Court of Appeals for the Ninth Circuit · 1954
18 more not listed; retrieve them via the Exa API.