Patents by Inventor Terence R. Duke

Terence R. Duke 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).

  • Sail
    Patent number: 4924794
    Abstract: In its preferred form the present invention comprises an aerofoil sail having tensioned battens and an internal web structure to maintain an aerodynamically efficient shape.
    Type: Grant
    Filed: November 1, 1988
    Date of Patent: May 15, 1990
    Inventor: Terence R. Duke