Patents by Inventor Warren R. Erickson

Warren R. Erickson 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).

  • Vehicle having variable gauge rail wheels
    Patent number: 4942826
    Abstract: Rail wheels and road wheels of vehicles may be easily modified to differing axle lengths, so that, typically, the vehicle may roll on rails of differing gauges. An easily installable and removable spacer is provided to the axle systems of the vehicle.
    Type: Grant
    Filed: April 12, 1989
    Date of Patent: July 24, 1990
    Assignee: Trackmobile, Inc.
    Inventors: Warren R. Erickson, Robert L. Siewert