Wahl v. N. E. Norstrom Electric Mfg. Co.

LINDLEY, District Judge.

Plaintiff, Wahl, patentee in patents No. 1,471,536, October 23, 1923, No. 1,479,486, January 1, 1924, and No. 1,487,189, March 18, 1924, charges the defendant, N. E. Norstrom Electric Manufacturing Company, with infringement of each of said patents, and prays for an injunction and an accounting. The defendant asserts invalidity, anticipation, prior invention, and lack of infringement. Defendant also asserts that certain claims of patent No. 1,487,189, being for matter not set forth in the original application, are void, and also insists that there is not sufficient…