O'BRIEN, District Judge.
The plaintiff herein brought an action at law to recover $250,000 damages allegedly caused by defendant's infringement of plaintiff's United States Letters Patent No. 1,320,775, dated November 4, 1919, which expired November 4, 1936. The suit was instituted on the 4th day of August, 1937, and defendant's answer filed October 1, 1937. In its answer the defendant pleaded the legal defenses of invalidity and infringement, as well as the equitable...
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