J. D. Wallace &. Co. v. Portable Power Tool Corp.

LINDLEY, District Judge.

Appellant appeals from a decree dismissing its bill of complaint for infringement of letters patent No. 1,314,291 issued to- Wallace. The district court found that appel-lee does not infringe.

Wallace described and claimed a combination of elements intended to produce, over the prior art, an improved circular sawing device and accompanying appliances. Claim 12, said to be typical of all claims in suit, is as follows: “The combination with a saw-table having a slot and a circular saw projecting through the slot, of a guard substantially concentric with the saw and also…