MANTON, Circuit Judge.
This suit is for infringement of claims 3 and 4 of patent No. 1,724,583, granted August 13, 1929, on an application filed May 11, 1928, and claims 3 and 6 of patent No. 1,808,721, granted June 2, 1931, on an application filed May 25, 1929, as a continuation in part of an earlier application.
The court below held the claims invalid for lack of invention. The inventions relate to the art of heat treating tool steels so as to obtain desired...
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