Triangle Conduit & Cable Co. v. National Electric Products Corp.

KIRKPATRICK, District Judge.

The plaintiff makes certain types of electrical wire and cable covered by a number of the defendant’s patents. It began this action for a declaratory judgment to establish the invalidity and noninfringement of the patents and the defendant counterclaimed for infringement. As the case now stands, six patents, which fall into three groups of two each, are involved. As to each, the only issue is validity, because, if valid, the plaintiff clearly 'infringes them all.

1. The Serving Patents.

The first two patents, Robinson and Moore, Nos. 2,222,555 and 2,222,556, have to…