WILLIAM C. COLEMAN, District Judge.
The present suit arises under the patent laws and is based upon alleged infringement by the defendant of a patent upon a device for extracting soot and grease from flue gases escaping from gas ranges. The patent, No. 1,722,005, was issued July 23, 1929, to Joseph A. McCarthy, and the plaintiff now owns it by virtue of assignment. The patent contains sixteen claims, but infringement is based upon six claims only, namely, those numbered...
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