Patents by Inventor Darrel Walters

Darrel Walters 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: 5090841
    Abstract: A boat lift in which a hydraulic pump and cylinder with a piston is mounted on a manual boat lift so that the piston rod carries a pulley which engages the lifting cable so that when the piston moves in the cylinder the boat will move up or down.
    Type: Grant
    Filed: September 6, 1990
    Date of Patent: February 25, 1992
    Assignee: Brammall, Inc.
    Inventors: Clarence A. Penick, Jr., Darrel Walters