Patents by Inventor Warren John Preston

Warren John Preston 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).

  • Pump
    Patent number: D555669
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: November 20, 2007
    Assignee: MacNaught Pty Ltd
    Inventor: Warren John Preston
  • Meter
    Patent number: D556616
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: December 4, 2007
    Assignee: MacNaughty Pty Ltd.
    Inventors: Warren John Preston, Peter Robert Kerr
  • Pump
    Patent number: D557709
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: December 18, 2007
    Assignee: MacNaught Pty Ltd
    Inventor: Warren John Preston
  • Meter assembly
    Patent number: D569480
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: May 20, 2008
    Assignee: MacNaught Pty Ltd.
    Inventors: Warren John Preston, Peter Robert Kerr