DAVIS, Circuit Judge.
This is an appeal from a decree of the District Court holding claims 2, 6, and 7 of United States letters patent No. 1,593,735, issued to Frederick K. Vreeland and Frank L. Dyer on July 27, 1926, valid and infringed.
The patent relates generally to the "art of recording sounds." It is used in making phonograph records, and relates more particularly to a plurality of transmitters electrically connected to the same recorder with separate...
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