HARTIGAN, Circuit Judge.
This is an appeal from a decree of the United States District Court for the District of Massachusetts, entered September 16, 1959 upon plaintiffs-appellees' motion for summary judgment, which adjudged invalid all claims under U.S. Patent No. 2,804,395 of the defendant-appellant and dismissed his counterclaim for infringement.
Plaintiffs petitioned the district court under 28 U.S.C. §§ 2201, 2202 (1958) for a declaratory judgment...
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