Patents by Inventor Walter L. Treadwell

Walter L. Treadwell 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).

  • Apparatus and method for moving a large object
    Patent number: 4222581
    Abstract: The method and apparatus for moving a large object using four crawler transporters disposed in a rectangular or a trapezoidal pattern under the object and which support and move the object with an effective three point suspension.
    Type: Grant
    Filed: April 7, 1978
    Date of Patent: September 16, 1980
    Assignee: Rigging International
    Inventors: Walter L. Treadwell, Kenneth F. Dewing