Schulenburg v. Signatrol, Inc.

Plaintiffs manufacture and sell devices for automatically making and breaking electrical circuits. Such devices known in the trade as flashers are used in display signs where changing light patterns or a flashing effect is thought desirable. Plaintiffs were first in the field, at least they were there before defendants, all of whom are former employees who left to form their own competing company, Signatrol, also a defendant. For our purposes we can group defendants as one as we can the various plaintiffs. The lower court issued an injunction restraining defendants from the further…