Patents by Inventor Graham Maurice Brown

Graham Maurice Brown 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).

  • Viewer for gemstones
    Patent number: D460470
    Type: Grant
    Filed: April 18, 2001
    Date of Patent: July 16, 2002
    Assignee: Gersan Establishment
    Inventor: Graham Maurice Brown
  • Apparatus for viewing gemstones
    Patent number: D427617
    Type: Grant
    Filed: January 4, 1999
    Date of Patent: July 4, 2000
    Assignee: Gersan Establishment
    Inventor: Graham Maurice Brown