BYERS, District Judge.
Plaintiff petitions for a declaratory judgment that Frost United States Letters Patent No. 2,157,407 are invalid and have not been infringed by it. This because an actual controversy exists between the parties on that subject, and because defendants "are representing to purchasers, prospective purchasers and users of" plaintiff's product that infringement of the said Frost patent is involved in the manufacture, sale and use of plaintiff's device...
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