Hamilton v. Mid-West Abrasive Co.

WILLSON, District Judge.

This is an action by plaintiff, Alfred E. Hamilton, for money damages and in-junctive relief against the defendant, Mid-West Abrasive Company, for infringement of plaintiff’s United States Letters Patent No. 2,442,042, issued May 25, 1948. This Hamilton patent covers a grinding apparatus used in the stainless steel industry to grind away scales and surface defects on stainless steel slabs or billets at an intermediate point of production. Plaintiff contends that defendant’s slab grinding machines and its billet grinding machine infringe on plaintiff’s claim 7, and…