Patents by Inventor Harvey John Hannah

Harvey John Hannah 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).

  • Underwater cleaning
    Patent number: 3959838
    Abstract: An underwater surface cleaning apparatus particularly suitable for swimming pools which includes brushes driven by suction of water from immediately around the apparatus through a vane type motor which is coupled to rotate the brush. The motor can include hinged vanes.
    Type: Grant
    Filed: February 28, 1974
    Date of Patent: June 1, 1976
    Inventor: Harvey John Hannah