CHASE, Circuit Judge.
The plaintiff's bill charged infringement of claims 1 and 2 of patent No. 1,550,332 issued to Paul A. Bancel August 18, 1925, for a surface condenser. Such condensers serve to cool the steam which flows from the exhaust of a steam engine to return the part which is condensable to water for use again in the boiler. The patent is concerned with the type of condenser which operates at pressures less than atmospheric and especially with the so-called...
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