Tandy Corp, which already makes some personal computers for Matsushita Electric Industrial Co Ltd to sell in the US, is to expand its collaboration with the Osaka, Japan, company by forming an equally-owned US joint venture called PTCC Inc at an existing Tandy plant in Fort Worth, Texas to manufacture laptop and notebook personal computers, with production set to start in February, 1992, initially with about 100 people. The plant will have capacity for more than 10,000 machines a month, to be marketed by Tandy and Matsushita under the Panasonic, Tandy, GRiD and Victor names, and also to be offered OEM to other companies. Each will license proprietary technology to the new company, and any technologies it develops will be shared by the two.