ALLEN, Circuit Judge.
Appeal from a decree of the District Court holding Claims 3 and 4 of Fahlman Patent 1,770,368, issued July 8, 1930, and owned by appellee, valid and infringed. The case had previously been referred to a special master who concluded that the claims were invalid, but if valid, were not infringed. The claims are printed in the margin.
The patent is for a structure and relates to permanent molds to be used in...
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