Patents by Inventor Richard C. Agnew

Richard C. Agnew 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).

  • Wire jaw stoneholder
    Patent number: 5378032
    Abstract: An improved stoneholder for supporting diamonds and other gemstones comprising a pair of clasping members and a pair of respective clasp mounts. Each clasping member comprises a pair of stone support members which are joined at a distal end, separated by an aperture, and mounted to one of the respective clasp mounts at a proximal end.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: January 3, 1995
    Assignee: GIA Gem Instruments Corporation
    Inventors: Richard C. Agnew, Robert Van Den Heuvel
  • Darkfield loupe
    Patent number: D351176
    Type: Grant
    Filed: October 27, 1992
    Date of Patent: October 4, 1994
    Assignee: GIA Gem Institute Corporation
    Inventors: Richard C. Agnew, Robert Van Den Heuvel