OPINION
ALDRICH, Senior Circuit Judge.
This is a suit by St. Regis Paper Co., owner of two patents, No. 3,001,684, Wenzel, Service Tray, September 26, 1961 (hereinafter W1) and No. 3,140,035, Wenzel, Service Tray, July 7, 1964 (hereinafter W2), against Winchester Carton Corp., alleging infringement. Defendant denies both infringement and validity. Both parties manufacture paperboard service trays used in the fast food industry...
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