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:
Sep. 03, 1991
Filed:
Jun. 30, 1989
Masaki Kakihara, Hiroshima, JP;
Masao Sasaki, Higashihiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
Disclosed is a navigation apparatus for showing a driver the current position of his vehicle by estimating the vehicle position on the basis of the travel direction and travel distance thereof and matching the current vehicle position thus estimated to map information stored previously. The apparatus disclosed is capable of navigating a vehicle with accuracy even if it is traveling on a road which is not stored in memory; in that case, the apparatus repeats comparison of the vehicle travel direction with the directions in which lie the current vehicle position and respective nodes stored in memory, and accumulates the comparison results so as to infer the arrival of the vehicle at its destination which corresponds to one of the nodes stored in memory.