31 Incorporated was founded in 1961 by Bob Cornell, a former employee of Tech International. In 1985 Bob Hendry and Chuck Muhs joined the company to run sales and operations. In 1987 Bob and Chuck acquired the company from Mr. Cornell when he was ready to retire from the business. From humble beginnings,31 Inc. has grown to become well-known internationally as a leading manufacturer of professional tire repair, TPMS, and supplies. Primary manufacturing is still operated in rural Newcomerstown, OH USA, as well as a secondary manufacturing operation in China, Zhejiang, Shangyu city.