KOELSCH, Circuit Judge.
By its complaint, Engelhard Industries, Inc. (Engelhard) charged Research Instrumental Corp. (Research) with infringement of U. S. Letters Patent No. 2,805,191, and with unfair competition. The patent was issued on September 3, 1957 to Engelhard's assignor Hersch and is entitled "Oxygen Analysis of Gases." In the complaint Engelhard alleged that Research had infringed "the patent" by manufacturing and selling oxygen analyzers that embodied...
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