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 arc 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 H. D. Morton and covered methods and means for...
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