Patents by Inventor John Schwingshandl

John Schwingshandl 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).

  • Hovercraft control system
    Patent number: 5273128
    Abstract: An air-cushion vehicle is provided with an intermediate plenum which provides air to the air-cushion cavity. Propulsion and steering is effected by means of two parallel double-ended ducts that are supplied air from the plenum. Complementary controlled flaps in the ends of the ducts allow the vehicle to be controlled, both for linear motion and for steering, through a two channel radio-control system.
    Type: Grant
    Filed: May 15, 1990
    Date of Patent: December 28, 1993
    Inventors: Leslie Clendening, John Schwingshandl