Patents by Inventor Curtis W. Simpson

Curtis W. Simpson 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).

  • Boat lift
    Patent number: 3991698
    Abstract: A pair of elongated ski-like members are secured in parallel spaced-apart relation to the rearward end portion of the bottom surface of a boat hull for supporting the bottom surface adjacent the surface of the water during a predetermined rate of acceleration.
    Type: Grant
    Filed: August 14, 1975
    Date of Patent: November 16, 1976
    Inventor: Curtis W. Simpson