The M22 Locust was designed and produced by the company that was a manufacturer of what types of vehicles until the early 1960s?
M22 Locust:  The United States Ordnance Department was asked to produce this replacement, which in turn selected Marmon-Herrington to design and build a prototype airborne tank in May 1941. Marmon-Herrington:  Earlier, the company built military vehicles and some tanks during World War II, and until the late 1950s or early 1960s was a manufacturer of trucks and trolley buses.
trucks and trolley buses