PERRY, District Judge.
This is an action for infringement of United States Letters Patent No. 2,816,437 issued on December 17, 1957 to plaintiff, Central Scientific Co., as assignee of Carl S. Hornberger and William R. Lewis. Defendant counterclaimed for a declaratory judgment of non-infringement and invalidity. Its counterclaim, however, was later withdrawn except insofar as it relates to claims 15, 16 and 17, being the three claims in suit.
The cause having...
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