William G. Wagenhals applied for a Steam Motor Car patent on May 18, 1906. It was granted on September 11, 1906. It concerns a steam engine mounted on a railroad truck to drive a passenger rail car.

William G. Wagenhals Patent, 830,940, Steam Motor Car, May 18, 1906 September 11 1906

This original patent is incomplete. It contains two page 3s and is missing pages 1 and 4. The two page 3s are printed on the backs of different drawings.