BREWSTER, District Judge.
Plaintiff in this action seeks a declaratory judgment, declaring invalid Letters Patent of the United States No. 1,945,263, issued January 30, 1934 to Frank C. Doble, assignor to the defendant, or, if valid, that the plaintiff does not infringe. The defendant filed a counterclaim for infringement of the patent.
The cause was referred to a master, who upheld Claim 15 of the patent, the only one in question, but concluded that the plaintiff...
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