MEDINA, District Judge.
This case involves alleged infringement by defendant Frost White Paper Mills, Inc. and contributory infringement by the intervener American Paper Machinery & Engineering Works, Inc. of the method claims 1, 2, 3, 4 and 13 contained in Patent No. 2,351,492, of which the plaintiffs are respectively the assignee and licensee. The pleadings also present the issue of validity. The apparatus claims of the said patent are not involved.
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