05046011 is referenced by 145 patents and cites 4 patents.

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.

Title
Apparatus for navigating vehicle
Application Number
7/374262
Publication Number
5046011
Application Date
June 30, 1989
Publication Date
September 3, 1991
Inventor
Masao Sasaki
Higashihiroshima
JP
Masaki Kakihara
Hiroshima
JP
Agent
Price Heneveld Cooper DeWitt & Litton
Assignee
Mazda Motor Corporation
JP
IPC
G06F 15/50
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