Continental Machines, Inc. v. Grob

WOODROUGH, Circuit Judge.

The plaintiffs began in 1931 to make filing machines which operate much like the old common band saw, except that segments with file surface are attached to a belt and carried continuously around the two vertically spaced pulleys in the place of the old flexible saw blade, and metal work is pressed against the downward moving abrading surface instead of wood. The defendant began manufacturing its continuous filing machines in March, 1935, and the plaintiffs brought a suit for patent infringement. After a trial on the merits, the court decided against the plaintiffs…