Essex Razor Blade Corp. v. Gillette Safety Razor Co.

The respondent makes and sells safety razors and blades. The petitioner makes and sells only blades. The Gaisman patent No. 1,633,739, owned by the respondent, covers both safety razor blades and razors, and for the alleged infringement by petitioner of Claims 1 and 2 covering blades this suit was brought. The claims are so nearly alike that quotation of Claim 1 will suffice:

“A blade having a non-circular opening substantially centrally disposed to retain the blade in shaving relation to a guard member, said blade having means spaced from said opening to cooperate with a clamping member to…