Court of Appeals for the Seventh Circuit December 8, 1955, 11308 (The Weatherhead Company and Paul D. Wurzburger v. Drillmaster Supply Company and James E. Rutledge and Kenneth C. Horn)

SWAIM, Circuit Judge.

The plaintiffs-appellants are the assignees of two patents: one, No. 2,139,-413, issued December 6, 1938, on a joint for pipe connections, and the other, No. 2,171,217, issued August 29, 1939, on a metal packing ring for use with, as a part of, such a joint for pipe connections as was described in the first patent.