Patents by Inventor Douglas W. Renfro

Douglas W. Renfro 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).

  • Lawn and garden tool
    Patent number: D599633
    Type: Grant
    Filed: October 13, 2008
    Date of Patent: September 8, 2009
    Inventor: Douglas W. Renfro