CAMPBELL, District Judge.
This suit is brought for the alleged infringement of the following patents:
(1) Patent No. 1,405,173, issued to Hervey J. Wheeler, assignor to H. J. Wheeler Salvage Company, Inc., for pumping apparatus granted January 31, 1922, on an application filed June 16, 1920, of which claim 1 is in suit.
(2) Patent No. 1,894,234, issued to Gunnar C. Engstrand, assignor to Sludge Pumping, Inc., for oil pumping apparatus granted January...
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