SPARKS, Circuit Judge.
Appellants charged appellees with infringement of United States patents to Crowder numbered 1,820,867 and 1,963,778. The beneficial interest and exclusive license under these patents is in Para-Tone Co., Inc. The former patent was issued August 25, 1931, on an application filed May 24, 1929, and the latter was issued June 19, 1934, on an application filed June 1, 1931. The bill further alleged unfair competition, and demanded injunctive relief...
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