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:
May. 04, 2010
Filed:
May. 03, 2007
Applicant:
Katsuhiko Mutoh, Toyota, JP;
Inventor:
Katsuhiko Mutoh, Toyota, JP;
Assignee:
DENSO CORPORATION, Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01C 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A navigation system for use in a vehicle receives a GPS signal for having a GPS time data that rolls over at an interval of 19.7 years with a start time of 0 a.m. Jan. 6th, 1980 from a GPS satellite, and acquires map generation date information that specifies map data generation time from map database in the navigation system. The GPS time data and the map data generation time information are utilized for calculating an accurate current date and time.