Guardian Trust Co. v. Downingtown Mfg. Co.

DAVIS, Circuit Judge.

This was a suit brought by the Guardian Trust Company, trustee, and the Paper & Textile Machinery Company, against the Downingtown Manufacturing'Company, defendant, for the infringement of United States letters patent No. 1,025,822, for improvements in paper-making machines, issued to William EL Mills-paugh on May 7, 1912. The plaintiffs own the patent and charge that the defendant infringes it by the manufacture and sale of suction couch rolls with the knowledge and intent that they were to be used in machines embodying the invention of claims 2, 3, and 5 of the patent.

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