Patents by Inventor Chiayee S. Chang

Chiayee S. Chang 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).

  • Mode determination for mobile GPS terminals
    Patent number: 6703971
    Abstract: The present invention discloses a system for determining the position of a GPS terminal. The system comprises a GPS terminal, a location aiding server, and a communications system. Messages are passed between the GPS terminal and the server, as well as within the GPS terminal, to determine the mode of operation of the GPS portion of the system. Decisions are made based on availability of aiding data and Quality of Service requirements.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: March 9, 2004
    Assignee: SiRF Technologies, Inc.
    Inventors: Ashutosh Pande, Lionel J. Garin, Chiayee S. Chang, Gengsheng Zhang, Randall J. Silva
  • Mode determination for mobile GPS terminals
    Publication number: 20020154058
    Abstract: The present invention discloses a system for determining the position of a GPS terminal. The system comprises a GPS terminal, a location aiding server, and a communications system. Messages are passed between the GPS terminal and the server, as well as within the GPS terminal, to determine the mode of operation of the GPS portion of the system. Decisions are made based on availability of aiding data and Quality of Service requirements.
    Type: Application
    Filed: February 21, 2002
    Publication date: October 24, 2002
    Inventors: Ashutosh Pande, Lionel J. Garin, Chiayee S. Chang, Gengsheng Zhang, Randall J. Silva