Patents by Inventor John M. Stubstad

John M. Stubstad 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).

  • Helicopter soft snow landing aid
    Patent number: 5065958
    Abstract: An aircraft landing gear system including a window shaped type membrane wh is mechanically stretched prior to landing. The large surface area of the membrane would significantly increase the load bearing area of the helicopter, enabling landing in snow. Upon takeoff, the member would be rolled up.
    Type: Grant
    Filed: September 2, 1986
    Date of Patent: November 19, 1991
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: John M. Stubstad, John H. Rand