Patents by Inventor Francis F. Chen

Francis F. Chen 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).

  • Helicon plasma source with permanent magnets
    Patent number: 8179050
    Abstract: A helicon plasma source has a discharge tube, a radio frequency antenna disposed proximate the discharge tube, and a permanent magnet positioned with respect to the discharge tube so that the discharge tube is in a far-field region of a magnetic field produced by the permanent magnet.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: May 15, 2012
    Assignee: The Regents Of The University of California
    Inventor: Francis F. Chen
  • Helicon plasma source with permanent magnets
    Publication number: 20080246406
    Abstract: A helicon plasma source has a discharge tube, a radio frequency antenna disposed proximate the discharge tube, and a permanent magnet positioned with respect to the discharge tube so that the discharge tube is in a far-field region of a magnetic field produced by the permanent magnet.
    Type: Application
    Filed: December 21, 2007
    Publication date: October 9, 2008
    Applicant: The Regents of the University of California
    Inventor: Francis F. Chen