SMITH, District Judge.
This is a suit under the patent laws for the infringement of two patents of which the plaintiff is admittedly the owner. The one, No. 1,558,845, hereinafter referred to as '845, issued on an application filed by the plaintiff on June 7, 1924; the other No. 1,589,947, hereinafter referred to as '947, issued on an application filed by the plaintiff on September 19, 1925. The defendant denies infringement and challenges the validity of the patents...
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