Legal Opinion
Ladd v. W. & H. Walker, Inc.
Court of Appeals for the Third Circuit
Decided August 12, 1925No. 3099PublishedCited by 7 opinions
1Opinion of the Court
RELLSTAB, District Judge.
The patent in suit is for a furnace for steam boilers.
George T. Ladd, owner of Ritts patent, No. 1,258,248, granted March 5,1918, charges the defendants jointly and individually with infringing this patent. The issues are invalidity and infringement.
The District Court dismissed the bill. It held the patent invalid because the subject-matter thereof was neither disclosed in the original application as filed nor supported by the inventor’s oath, and for lack of-novelty. It- also held that, even if the patent were valid, it was not infringed by the defendants’ furnace.
Rit…
2Cases cited10 opinions
- Imperial Bottle Cap & Machine Co. v. Crown Cork & Seal Co.Court of Appeals for the Fourth Circuit · 1905
- Firestone Tire & Rubber Co. v. SeiberlingCourt of Appeals for the Sixth Circuit · 1918
- Underwood Typewriter Co. v. Royal Typewriter Co.Court of Appeals for the Second Circuit · 1915
- Evans v. Hall Printing Press Co.Court of Appeals for the Second Circuit · 1915
- Russell Grader Mfg. Co. v. F. B. Zeig Mfg. Co.Court of Appeals for the Sixth Circuit · 1919
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3Cited by7 opinions
- McKays Co. v. Penn Electric Switch Co.Court of Appeals for the Eighth Circuit · 1932
- Etten v. KauffmanCourt of Appeals for the Third Circuit · 1941
- Hyman v. F. W. Woolworth Co.Court of Appeals for the Eighth Circuit · 1928
- Geneva Laboratories Limited v. Nike West African Import And Export Inc.District Court, E.D. New York · 2022
- Kearns v. Federal Aviation AdministrationDistrict Court, District of Columbia · 2018
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