McLELLAN, District Judge.
This suit involves alleged infringement of four patents, United States Patents Nos. 1,344,503, 1,344,504, 1,650,511 and 1,687,441, all issued to James E. Grosjean. It involves, too, alleged infringement of United States Trade Mark Registrations Nos. 149,142 and 285,219. Unfair competition is also charged. In its answer, the defendant asserts non-infringement and invalidity of the various patents in suit. It also avers non-infringement of...
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