KNIGHT, District Judge.
Plaintiff sues for infringement of Letters Patent. Defendant answering denies infringement and includes a counterclaim upon which it petitions for a declaratory judgment.
The charge of infringement is based upon the manufacture and sale of a certain refining and heating apparatus by a corporation designated as "Ross Heater & Manufacturing Company, Inc." to the "Quaker State Oil Refining Corporation" in the year 1933. Ross Heater...
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