THOMAS F. MURPHY, District Judge.
Plaintiff as owner of U. S. Patent No. 2,495,142, entitled "Transparency Mount and Method of Making Same" brings this action alleging infringement by defendant of claim 4 thereof and contributory infringement of claims 1, 2, 3 and 5.
Defendant counterclaims for a declaration of the patent's invalidity as to all claims, non-infringement, and to enjoin plaintiff from threatening defendant and its customers with suit.
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