HUTCHESON, District Judge.
This is a suit brought on patent 1,270,519, granted to the plaintiff, Driver-Harris Company, assignee of John C. Henderson, dated June 25, 1918, for a "box for treating metallic articles by heat." The claims involved are claims 1, 2, and 3.
The Henderson invention comprises a box for heat-treating metallic articles, which, together with its cover, is made of an alloy essentially of nickel and chromium, or its equivalent, cobalt and...
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