American Photocopy Equipment Company, an Illinois Corporation v. Rovico, Inc., a New Jersey Corporation

SCHNACKENBERG, Circuit Judge.

Rovico, Inc., a New Jersey corporation, appeals from an order of the district court granting to American Photocopy Equipment Company, an Illinois corporation, a preliminary injunction restraining Rovico from making, using or selling transfer diffusion reversal photocopy machines “which infringe the claims of United States Letters Patent No. 2,657,-618” (known as the Eisbein patent).

Said patent we held valid in Copease Mfg. Co. v. Apeco, 7 Cir., 298 F.2d 772 (1961). It was later assigned by Copease to the present plaintiff, which was defendant in that case.

In…