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. 16, 1995
Filed:
Feb. 18, 1993
Akihito Shibata, Yokohama, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The navigation system includes sensors for detecting a condition of a vehicle's movement, an imaginary location calculating device for calculating an existence location of the vehicle, a straight condition processing device for judging whether or not the vehicle is traveling straight, thereby forming a straight travel locus in a condition of straight travel, map data, a road searching-straightening processing device for extracting information concerning a road so as to form a locus as a straight road, a direction rectifying data calculating device for producing a direction offset by calculating direction errors, a location rectifying data calculating device for calculating a location offset, and a location direction rectifying device for rectifying a location and direction of the vehicle by respectively providing a direction offset and location offset with respect to an estimated direction and an estimated location.