1950 Marman Twin motorbike built on the base of Schwinn bicycle. The company delivered power units to the dealers, who did assembly motorbikes according to the instruction.
Marman Products Company, Inc. of Inglewood, California, was a business established in 1941 by Zeppo Marx (1901–1979,the youngest of the Marx Brothers). Before WW2 Marman Products made clamping devices and straps. During World War II, like many other companies Marman was involved in the war effort. As part of this, Marman Products produced the "Marman Clamp", used to support the atomic bombs carried on the Enola Gay. In 1948 the company developed and marketed 2-cylinder low-powered motorcycle brand, the "Marman Twin". It was manufactured only for two years. According to some sources, Marman Twin was sold to the Jack & Heintz Precision Industries, Inc in Ohio and continued as the Jack & Heintz Twin Bicycle Motor.