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:
Feb. 28, 1995
Filed:
Dec. 20, 1993
Applicant:
Inventor:
Wei-Wen Kao, Fremont, CA (US);
Assignee:
Zexel USA Corp., Fort Worth, TX (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364450 ; 364449 ; 364454 ; 364444 ; 364453 ; 36442402 ; 36442401 ; 342357 ; 340990 ; 340995 ;
Abstract
A hybrid vehicle navigation system employs both GPS and dead reckoning sensors, working in parallel, to produce a sensed and a calculated position, respectively. The sensed and the calculated positions are compared to a road data base to determine separate correction factors required to correct the sensed and the calculated positions. In one embodiment, the system employs either the sensed or calculated position for navigation depending on which has the smaller correction factor.
Published as: