The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2007
Filed:
Jul. 30, 2004
Applicants:
Sanjai Kohli, Manhattan Beach, CA (US);
Steven Chen, Cerritos, CA (US);
Inventors:
Sanjai Kohli, Manhattan Beach, CA (US);
Steven Chen, Cerritos, CA (US);
Assignee:
SiRF Technology, Inc., San Jose, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H04L 27/06 (2006.01); H04B 7/185 (2006.01); G01C 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A GPS car navigation system derives GPS position update information from motion of the car along the actual track. Turns along the track are detected when they actually occur and are compared with the predicted turns so that the time and position at the actual turn can be used to update the then current GPS derived position of the vehicle. Updating position information with actual turn data improves the accuracy of GPS navigation especially during single satellite navigation.