Westinghouse Electric & Mfg. Co. v. Wagner Electric Mfg. Co.

DYER, District Judge.

The litigation in this case has extended over a period of more than 15 years, and has been before this court and the appellate courts several times. The original suit brought by the complainant against the defendant was a bill in equity alleging infringement of United States patent No. 366,362, granted to Westinghouse. The particular claim of the patent alleged to have been infringed was claim 4. That claim is as follows:

“4. The combination, -substantially as described, of an electric converter constructed with open spaces in its core, an enclosing case, and a…