YANKWICH, District Judge.
Suit for infringement of letters patent No. 2,067,963, relating to footwear, issued on January 19, 1937, and owned by plaintiff as successor to Pasadena Slipper Co. The defendants have denied infringement and have challenged the validity of the four claims of the patent in suit.
Plaintiff and defendants have long been in the same competitive field of shoe manufacturing. The defendant Maling secured, on March 14, 1939, letters patent...
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