Patents by Inventor George M. Ketcham

George M. Ketcham 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).

  • Self-powered towing servomechanism
    Patent number: 5330020
    Abstract: A wheeled tailer power unit includes a self-powered, self-contained towing servomechanism that permits selective towing and control of a trailing vehicle by a leading vehicle in the absence of a power transmitting and control umbilical between the leading vehicle and the trailer power unit, A controller included in the trailer power unit measures the relative displacement of the unit and the leading vehicle and communicates to a unit control and drive means appropriate signals to operate variable torque transmitting drive means operating the respective wheels of the trailer power unit.
    Type: Grant
    Filed: June 3, 1991
    Date of Patent: July 19, 1994
    Inventor: George M. Ketcham
  • Obedient self-powered slave vehicles
    Patent number: 4771838
    Abstract: An intelligent slave vehicle follows the movements of a master vehicle without imposing a requirement on the master vehicle to supply towing power for the slave vehicle, the slave vehicle being self powered and self controlling in dependence on movements of the master vehicle.
    Type: Grant
    Filed: May 21, 1987
    Date of Patent: September 20, 1988
    Inventor: George M. Ketcham