Legal Opinion
Piano Motors Corp. v. Motor Player Corp.
Court of Appeals for the Third Circuit
Decided August 1, 1922No. 2882PublishedCited by 11 opinions
1Opinion of the Court
WOOLLEY, Circuit Judge.
This action was brought by the Motor Player Corporation against Piano Motors Corporation and George W. Garman for infringement of Letters Patent No. 1,320,224. The patent was acquired by the Motor Player Corporation through mesne assignments from Garman, the patentee and co-defendant.
The invention of the patent is a motor driven suction producing apparatus for a player piano, adapted to take the place of some*437what similar foot-operated devices commonly used in such instruments. Its purpose is to create a vacuum necessary to actuate the various hammers, expression devices…
2Cases cited5 opinions
- Lamb Knit Goods Co. v. Lamb Glove & Mitten Co.Court of Appeals for the Sixth Circuit · 1902
- Leader Plow Co. v. Bridgewater Plow Co.Court of Appeals for the Fourth Circuit · 1916
- Alvin Mfg. Co. v. ScharlingU.S. Circuit Court for the District of New Jersey · 1900
- Smith v. RidgelyCourt of Appeals for the Sixth Circuit · 1900
- Societe Anonyme Usine J. Cleret v. RehfussU.S. Circuit Court for the District of Eastern Pennsylvania · 1896
3Cited by11 opinions
- Westinghouse Electric & Manufacturing Co. v. Formica Insulation Co.Supreme Court of the United States · 1924
- Freeman v. AltvaterCourt of Appeals for the Eighth Circuit · 1933
- Libbey Glass Mfg. Co. v. Albert Pick Co.Court of Appeals for the Seventh Circuit · 1933
- National Cash Register Co. v. Remington Arms Co.Court of Appeals for the Third Circuit · 1923
- Motor Player Corporation v. Piano Motors CorporationDistrict Court, D. New Jersey · 1927
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