Patents by Inventor Benjamin N. Siebenberg

Benjamin N. Siebenberg 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).

  • Multi-stone oval gemstone assembly
    Patent number: 6519972
    Abstract: An assembly of gemstones which fit together to form a unitary shape is provided. The stones preferably make up an oval and are preferably four in number. Two of the stones are smaller than the other two. The larger stones are approximately 5/3 the size of the smaller stones.
    Type: Grant
    Filed: March 27, 2000
    Date of Patent: February 18, 2003
    Assignee: Am-Gold Products, Inc.
    Inventor: Benjamin N. Siebenberg
  • Common faceting for individual stones of a composite of diamonds
    Patent number: 6378335
    Abstract: A composite stone is formed of individual stones in which the faceting of the stones as viewed from the top is substantially identical. Providing a uniform faceting for each of the individual stones and substantially identical faceting for such stones provides an overall enhanced brilliance for the composite stone.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: April 30, 2002
    Assignee: Am-Gold Products, Inc.
    Inventor: Benjamin N. Siebenberg
  • Gemstone design
    Patent number: D562180
    Type: Grant
    Filed: February 14, 2007
    Date of Patent: February 19, 2008
    Inventor: Benjamin N. Siebenberg