Automatic Arc Welding Co. v. A. O. Smith Corp.

EVANS, Circuit Judge.

Appellant sued to enjoin the infringement of three patents: No. 1,648,560, issued November 8, 1927, covering electric arc welding; No. 1,278,985, issued Setember 17, 1918, covering portable electric are welding apparatus; No. 1,648,562, issued November 8, 1927, covering electric arc welding control methods and means; and to collect damages for past infringements. All three patents were issued to IT. D. Morton and covered methods and means for automatically welding with the electric arc.”

Appellee in its are welding work used three different metallic arc welding mechanisms…