Patents by Inventor Steven Lloyd Johns

Steven Lloyd Johns 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).

  • GPS patch antenna attitude reference system
    Patent number: 6459406
    Abstract: A pair of patch antennas are used to form a null slit antenna pattern for receiving GPS signals from at least three GPS satellites functioning as pseudo stars for spin rate and spin axis attitude determination for a spinning space vehicle in an earth orbit below the GPS satellites.
    Type: Grant
    Filed: May 24, 2001
    Date of Patent: October 1, 2002
    Assignee: The Aerospace Corporation
    Inventors: Gan-Tai Tseng, Jo-Lien Yang, Steven Lloyd Johns, Cheng A. Wu
  • GPS patch antenna attitude reference method
    Patent number: 6452543
    Abstract: A null slit antenna pattern receives GPS signals from at least three GPS satellites functioning as pseudo stars for spin rate and spin axis attitude determination of a spinning space vehicle in an earth orbit below the GPS satellites.
    Type: Grant
    Filed: May 24, 2001
    Date of Patent: September 17, 2002
    Assignee: Aerospace Corporation
    Inventors: Gan-Tai Tseng, Jo-Lien Yang, Steven Lloyd Johns, Cheng A. Wu