PICARD, District Judge.
This case is concerned with development of carbides as cutting tools, passing through innumerable stages and alleged advances in the art from about 1916 to the present day. That progress generated from the old axiom and accepted maxim that such a tool must be harder than the material it is to cut.
Carbides as tools came into use in World War I when Germany could not obtain industrial diamonds. High speed steels and stellites would cut...
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