OPINION
DAY, Chief Judge.
This is an action for infringement of U.S. Letters Patent No. 3,035,614 for improvements in an expansion tank to be used in hot water heating systems. Said U.S. Letters Patent was issued on May 22, 1962 on the application of Chester H. Kirk, Jr., filed on November 4, 1959, who thereafter assigned his entire right and interest therein to the plaintiff.
In its complaint the plaintiff alleges that it is the owner of said patent...
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