Patents by Inventor Howard M. Stewart

Howard M. Stewart 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).

  • Diatomaceous swimming pool filter with regenerative plates
    Patent number: 5397465
    Abstract: A filter including one or more regenerative plates which can be moved along the surfaces of filter grids to simultaneously create turbulence and physically dislodge a filter media cake within the filter by use of an externally extending driver rod, so as to regenerate the filter media.
    Type: Grant
    Filed: July 12, 1994
    Date of Patent: March 14, 1995
    Assignee: Jacuzzi Inc.
    Inventor: Howard M. Stewart
  • Filter element
    Patent number: D366516
    Type: Grant
    Filed: June 7, 1994
    Date of Patent: January 23, 1996
    Assignee: Jacuzzi Inc.
    Inventor: Howard M. Stewart