Patents by Inventor Ronald Twigg

Ronald Twigg 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: D485442
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: January 20, 2004
    Inventor: Ronald Twigg
  • Patent number: D632488
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: February 15, 2011
    Inventor: Ronald Twigg
  • Patent number: D632489
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: February 15, 2011
    Inventor: Ronald Twigg