BRUCHHAUSEN, District Judge.
This is an action for infringement of United States Patent No. 2,255,313, brought by plaintiff, Ellis-Foster Company, hereinafter called "Ellis-Foster" against defendant, Pittsburgh Plate Glass Company, hereinafter called "Pittsburgh" and defendant, Lunn Laminates, Inc., hereinafter called "Lunn".
The principal allegations of the complaint are as follows:
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