Patents by Inventor John E. Duquette

John E. Duquette 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).

  • Rotating ring mast sailing vessel and a method of vessel operation
    Patent number: 5197401
    Abstract: A system for powering a water vessel having as its principal components rectangular sails secured to a rectangular frame which in turn is attached to an annular mast rotatably mounted on a plurality of supports rigidly affixed to the vessel. In a second system the supports are rotatably mounted on the vessel in a manner such that the supports and the annular mast may rotate independently of each other.
    Type: Grant
    Filed: September 4, 1991
    Date of Patent: March 30, 1993
    Assignee: Warren Finley
    Inventors: Warren Finley, John E. Duquette