Patents by Inventor Lloyd C. Knowles

Lloyd C. Knowles 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).

  • Land ski apparatus
    Patent number: 4021052
    Abstract: A land ski device comprised of a pair of ski members each having a front wheel, a reverse braking member, means for affixing the toe portion of the user's boot to the ski member, two rear wheels located at the point of balance of the ski member, and a rear stationary braking member located at the bottom rear of the ski member.
    Type: Grant
    Filed: April 21, 1976
    Date of Patent: May 3, 1977
    Inventor: Lloyd C. Knowles
  • Catamaran anti-pitch hydrofoil
    Patent number: D271582
    Type: Grant
    Filed: September 3, 1981
    Date of Patent: November 29, 1983
    Inventor: Lloyd C. Knowles