KNAPPEN, Circuit Judge.
Suit for infringement of three United States patents relating to the pumping art, numbered, respectively, No. 1,385,141, July 19, 1921, No. 1,385,143, of same date, and No. 1,393,306, October 11, 1921 — all issued to P. A. Myers. As declared in the respective patents, the first and third relate to power-heads; the second to pumping apparatus. By due assignments, plaintiff appellee is the owner of all three patents. On final hearing the...
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