Patents by Inventor John D. Britton

John D. Britton 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).

  • Propeller clearing means
    Patent number: 4787870
    Abstract: The invention provides means to enable the propeller of a power driven watercraft to be viewed and cleared of any fouling material by access from the interior of the craft; suitably the propeller is viewed through and access is gained by means of a pierceable transparent diaphragm (7) set in a tube (2) which is inserted through and sealably attached to an aperture formed in the hull (1) of the craft immediately above the propeller.
    Type: Grant
    Filed: October 19, 1987
    Date of Patent: November 29, 1988
    Assignee: Herco David Limited
    Inventor: John D. Britton