Dur-Ram Packaging Devices, Ltd. v. Self-Seal Containers, Inc.

Plaintiff, a Canadian corporation not licensed to do business in Michigan, grants franchises or licenses to manufacture a mailing tube device, generally known as “Tube-O-Gram.” The device is patented in Canada and the United States. In March, 1966, plaintiff participated in a franchise show at Cobo Hall in Detroit, where defendants Bringer and McKee became interested in the product. Plaintiff provided a booklet entitled, “Invitation to Opportunity,” which outlined a hypothetical set-up, indicating possible needed personnel, probable production, and estimated profit from operating a franchise.…