structure of this new bus was unique in that the body also became the frame and two engines - "twin" engines - were used to allow for larger passenger loads. This concept was patented by William B. Fageol.

Over the years, Twin Coach made transit buses, trolley buses, small delivery vehicles, Fageol six-cylinder gasoline/propane bus and marine engines, Fageol four-cylinder marine engines, and aircraft and truck components. The company was sometimes referred