WOODBURY, Circuit Judge.
Alvin M. Marks as the owner of two United States patents, Nos. 2,104,949 and 2,199,227, and Depix Corporation as his exclusive licensee, brought suit in the court below against Polaroid Corporation for infringement of several claims of the patents. Polaroid answered and filed a counterclaim charging both plaintiffs with trademark infringement, unfair competition, and infringement of enumerated claims of three United States patents issued to...
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