PHILLIPS, Circuit Judge.
Ruth brought this suit against the Stearns-Roger Manufacturing Company for alleged infringement of patent No. 1,277,750 issued on September 3, 1918, for a flotation process and apparatus. From a decree adjudging claims one and three of the patent in suit valid and infringed, the Stearns-Roger Company has appealed.
The patent in suit relates to a process and machine for separating metalliferous minerals from rock by flotation. In general...
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