Patents by Inventor Frederick L. Doty

Frederick L. Doty 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).

  • Boat hull scrubbing apparatus
    Patent number: 4043286
    Abstract: Apparatus for scrubbing the hull of a boat comprising a pair of side frames spaced for a boat to be floated therebetween and a pair of generally horizontal power driven brushes extending transversely between the side frames. The brushes are pivotally secured together at their inner ends and are so mounted on the side frames that the position of the brushes is changeable as a boat floats over the brushes so that the brushes are maintained in scrubbing engagement with the bottom of the boat hull.
    Type: Grant
    Filed: May 17, 1976
    Date of Patent: August 23, 1977
    Inventor: Frederick L. Doty