James B. Clow & Sons, Inc. v. United States Pipe and Foundry Company

BELL, Circuit Judge.

' Appellant, defendant below, and appellee, plaintiff below, are large manufacturers of cast iron pressure pipe. Appellee sells a push-on joint under the trademark “Tyton-Joint” for use in joining pipe, while appellant sells a similar joint under the trade-mark “Bell-Tite” for the same use. This is an appeal from a judgment on a suit for patent infringement brought by appellee and entered in favor of appellee, owner of United States Letters Patent No. 2,953,398, holding claims 1, 2, 4, 5, 7, and 8 of that patent valid and infringed by the “Bell-Tite” joint of appellant.

The…