United Mattress MacHinery Co., Inc. v. Handy Button MacHine Co

McLAUGHLIN, Circuit Judge.

Appellant, a Maine corporation engaged in the manufacture of mattress making machinery and mattress tufting buttons, seeks the reversal of an adverse judgment in this patent infringement suit brought by it against appellee, a Delaware corporation which, among other things, also manufactures mattress tufting buttons. The subject of the liti gation is Mathewson patent No. 2,421,-280, granted May 27, 1947, and subsequently assigned to appellant. Infringement having been conceded the sole question here presented is whether the Mathewson patent is valid. Appellee offered…