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:
Jun. 06, 1995
Filed:
Dec. 14, 1993
Makoto Hijikata, Kawagoe, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A navigation apparatus is provided with a measurement device for measuring a present position of a movable body, and memory device for storing map data and a map matching device. The map matching device performs map matching on the basis of the present position data and the map data to obtain a plurality of present position candidacies and select a most reliable present position candidacy as a map matched present position among the present position candidacies, and updates present position display data indicating the map matched present position. The navigation apparatus is also provided with a display unit for displaying the map matched present position on a map and for displaying a travelling locus of the movable body on the basis of a plurality of present position display data updated in the past. The navigation apparatus is further provided with a candidacy memory device for storing the present position candidacy data by each group corresponding to one travelling locus, and a travelling locus replacing device for replacing the displayed travelling locus by use of one group of the present position candidacy data.