Patents by Inventor Francis Shan-Kwan Tang

Francis Shan-Kwan Tang 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).

  • Skull clamp
    Patent number: D456510
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: April 30, 2002
    Assignee: Allegiance Corporation
    Inventors: Robert F. Spetzler, Thomas Weidenmaier, Daniel Bass, Francis Shan-Kwan Tang, Terry James Johnston