Patents by Inventor Lloyd W. Stewart

Lloyd W. 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).

  • Construction tiles for making toy wall panels
    Patent number: 4270303
    Abstract: A toy building tile unit having a surface adapted to provide a building panel, edge margins of the panel being offset on both top and bottom of the tile. One of said offset edge margins carrying means for interlocking with another tile.
    Type: Grant
    Filed: April 30, 1979
    Date of Patent: June 2, 1981
    Assignee: Artzan Corporation
    Inventors: Piritheos G. Xanthopoulos, Lloyd W. Stewart