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:
Jan. 09, 1996
Filed:
Nov. 02, 1993
Shingo Kuwahara, Kawagoe, JP;
Satoshi Odagawa, Kawagoe, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A navigation system includes: GPS receiving device for receiving satellite information including accuracy information supplied from a plurality of GPS satellites and outputting at least the accuracy information, a measuring position as a receiving point calculated from the satellite information, and a declining rate of measuring accuracy calculated on the basis of the position of the GPS satellites; deviation calculating device for calculating a GPS measuring deviation by using the accuracy information and the declining rate of the measuring accuracy; map information storing device for storing map information including digitalized road information; and current position estimating device for estimating a current position by searching the road information within the radius of the GPS measuring deviation around the measured position.