NIELDS, District Judge.
In this patent suit, defendant filed an amended counterclaim alleging infringement by the plaintiff of United States letters patent No. 1,610,893, issued December 14, 1926, to Vincent F. Slezak. Paragraph 20 of the amended counterclaim reads: "20. Thereafter said United States Letters Patent No. 1,610,893, and the inventions and improvements therein described and claimed, and all rights of action for infringement thereof, were transferred and...
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