In the early 1960s, the Pritzker family bought the company, and soon the focus on full vehicle manufacturing ended, the truck designs being sold to a new company that traded under the Marmon brand. Marmon-Herrington's longtime main plant and headquarters in Indianapolis was closed in 1963. The remaining production became part of an association of companies which in 1964 adopted the name Marmon Group. During the Cold war era, Marmon diversified its production line by adding aircraft, missiles and rockets ground support equipment, manufactured by its subsidiary, Cardair, based in Chicago, Illinois.