Cawood v. Coe ( 1941 )

PER CURIAM.

This is a suit to obtain a patent on an improvement in ball mills for grinding or “dispersing” paint, ink products, etc. The claims relate to “streamlined enlargements” or gradual undulations on the inside of, and integral with, the wall of the mill. We think the Patent Office and the District Court were clearly right in finding that the claims lack invention over the prior art.

Affirmed.