Patents by Inventor Robert D. Carroll

Robert D. Carroll has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Electric power plant for vehicles
    Patent number: 5385211
    Abstract: The drive wheels of an electric automobile are driven by one or more D.C. drive motors which derive their power from a battery. The battery is charged by two separate D.C. generators. The first D.C. generator is powered by an internal combustion engine, and the second D.C. generator is powered by a steam engine. The steam engine uses waste heat from the internal combustion engine to boil its operating liquid.
    Type: Grant
    Filed: May 12, 1993
    Date of Patent: January 31, 1995
    Inventor: Robert D. Carroll