COOPER, District Judge.
This suit is brought by the plaintiff company for the infringement of three patents issued to Armstrong, plaintiff's assignor. The patents are numbered 1,322,511, 1,456,088, and 1,533,782, respectively, and will be referred to herein as the first, second, and third patents.
The first patent is for a stable surface alloy steel, the essential components of which are silicon, chromium, carbon, and iron. This patent was applied for May...
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