Patents by Inventor Warren David Litchfield

Warren David Litchfield 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).

  • Patent number: 8448957
    Abstract: Sulky apparatus for use behind a self-propelled machine including sulky operator riding apparatus for supporting an operator behind a self-propelled machine that the sulky apparatus is attached to, an upward extending control column adapted to be located near the operator controls for the self-propelled machine, a deployment boom attached to the sulky operator riding apparatus for deploying the sulky operator riding apparatus having a lower portion pivotally attached to the control column for deploying and for retracting the sulky operator riding apparatus to a stored position, and sulky apparatus control apparatus for controlling the operation of the sulky apparatus deployment boom. The control apparatus includes a gas filled cylinder and a chain.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: May 28, 2013
    Inventors: Steve R. Houston, Thomas Russell Stokes, Warren David Litchfield