This is an action for a declaratory judgment instituted under section 274d of the Judicial Code, 28 U.S.C.A. § 400 and under the patent laws, and plaintiff seeks a declaration of invalidity and non-infringement of Jungersen Patent No. 2,118,468.
Defendant, Jungersen, the owner of the patent in suit, by counterclaim alleges infringement by plaintiff, Ostby & Barton, of the said patent...
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