Patents by Inventor Terrence R. Duke

Terrence 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: 4741282
    Abstract: An aerofoil sail, with two sailcloth sides of substantially equal area and shape, and an airspace between them, and includes vents by which the airspace may be inflated by the wind, and structure by which either side of the sail may be made shorter from tack to clew than the other.
    Type: Grant
    Filed: November 5, 1986
    Date of Patent: May 3, 1988
    Inventor: Terrence R. Duke