Patents by Inventor Douglas Chipperfield

Douglas Chipperfield 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).

  • Seating for shopping trolleys
    Patent number: D404880
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: January 26, 1999
    Assignee: Clares Merchandise Handling Equipment Ltd.
    Inventor: Douglas Chipperfield
  • Handsaw protective holster
    Patent number: D411948
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: July 13, 1999
    Assignee: Peter Douglas Chipperfield
    Inventor: Peter Douglas Chipperfield