Patents by Inventor Robert S. Curtis

Robert S. Curtis 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).

  • Patent number: 4160425
    Abstract: A self-powered aquatic craft for moving individuals and objects through the water. A two-stroke-cycle internal combustion engine is provided with a diaphragm carburetor with an integral fuel pump which permits the craft to operate reliably in any position without flooding the engine. A manually operated priming device is employed in a novel manner to provide corrosion protection to the internal parts of the craft when it is not in use.
    Type: Grant
    Filed: December 29, 1977
    Date of Patent: July 10, 1979
    Inventor: Robert S. Curtis