Patents by Inventor John T. Hubbard, Jr.

John T. Hubbard, Jr. 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).

  • Levelling and stabilization system for a vehicle
    Patent number: 4084830
    Abstract: A levelling system for a travel trailer wherein first the tilt status of the trailer is sensed, and then, by means of controlled jacks on each side of the trailer, the trailer is first levelled about the pitch axis, then levelled about the roll axis, and then stabilized by bringing any jack not in contact with the ground into contact with the ground with a selected pressure.
    Type: Grant
    Filed: April 4, 1977
    Date of Patent: April 18, 1978
    Inventors: James A. Daniel, Jr., John T. Hubbard, Jr.