BARNES, Chief Judge.
This is a suit by Borg-Warner Corporation, owner by assignment of Hassler Patent No. 2,326,854, issued August 17, 1943, on an application filed April 1, 1940, on Method and Means for Sawing Wood, against defendant, Mall Tool Company, which is charged to have infringed and to be infringing said letters patent by making, selling and using chain saws embodying the invention of said patent. The defenses are non-infringement and invalidity.
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