Patents Assigned to Greenfield Enterprises, Inc
  • Navigation system and method
    Patent number: 6014610
    Abstract: An electronic compass system and method in which an automatic calibration process is available while the vehicle is in use. The procedure uses a binning process to collect and count data points which automatically triggers the automatic calibration process, and which is also used for manual calibration. Also, there is a procedure for detecting and rejecting anomalous magnetic events outside the vehicle through a jitter phenomenon.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: January 11, 2000
    Assignee: Greenfield Enterprises, Inc
    Inventors: Kevin Judge, Ronald Hatch