Patents by Inventor Landon J. Sproull

Landon J. Sproull 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).

  • Exterior sun visor for a truck
    Patent number: D409541
    Type: Grant
    Filed: November 3, 1997
    Date of Patent: May 11, 1999
    Assignee: Paccar Inc
    Inventors: Landon J. Sproull, Richard H. Barrett, Jr.