Patents by Inventor Siobhan Margaret D'Gama

Siobhan Margaret D'Gama 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).

  • Gemstone viewer
    Patent number: D682905
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: May 21, 2013
    Assignee: De Beers Centenary AG
    Inventors: Jonathan G Kendall, Peter Stanley Rose, Maxwell R Willis, James Gordon Charters Smith, Siobhan Margaret D'Gama, Christopher Daws, Sarah Louise Foster, Paul Priestman, David Hamilton