Patents by Inventor Graham R. Due

Graham R. Due 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).

  • Plant guard
    Patent number: D347170
    Type: Grant
    Filed: September 29, 1992
    Date of Patent: May 24, 1994
    Assignee: Gro-Guard Australia Pty. Ltd.
    Inventors: Graham R. Due, Robert A. Turnbull, Leigh Gryst
  • Plant guard
    Patent number: D353767
    Type: Grant
    Filed: December 8, 1993
    Date of Patent: December 27, 1994
    Assignee: Gro-Guard Australia Pty Ltd.
    Inventors: Graham R. Due, Robert A. Turnbull, Leigh Gryst