OPINION
AUGELLI, Chief Judge:
This is an action for infringement of claims 3 and 5 of United States Letters Patent No. 2,661,534 (hereinafter '534) issued to plaintiff, David Howard Keiser, Jr., on December 8, 1953, for an invention relating to "shearing devices of all types."
Plaintiff, a resident of Pennsylvania, and doing business as Keiser Manufacturing Co., is the owner of the '534 patent and has been such owner since the date of its issuance...
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