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:
Jul. 14, 1992
Filed:
Apr. 16, 1991
Yasuhiro Toyama, Anjo, JP;
Takashi Yamada, Anjo, JP;
Aisin AW Co., Ltd., both of, JP;
Kabushiki Kaisha Shinsangyokaihatsu, both of, JP;
Abstract
A navigation apparatus for a vehicle according to the present invention is designed to compare the distance from the previous intersection or feature to a further feature with the value from an odometer (2) and then to forcibly zero the remaining distance to the further feature when the difference between the distance and the value of the odometer becomes equal to or smaller than a predetermined value and when the feature is detected by a radar (12) or a road surface sensor (13). In consequence, even if the vehicle has to travel a long distance before it reaches an intersection where it makes a turn, a correct travelled distance can be obtained by correcting the distance detection errors as each feature is detected, thereby enabling a correct present position to be detected.