Patents by Inventor Stewart T. Kenyon

Stewart T. Kenyon 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).

  • Hydroponic gardening tray
    Patent number: D259867
    Type: Grant
    Filed: January 22, 1980
    Date of Patent: July 14, 1981
    Assignee: Stewart T. Kenyon
    Inventors: Stewart T. Kenyon, Walter C. Kenyon, Helmut D. Julinot