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:
Jan. 30, 1990
Filed:
Sep. 23, 1988
Masayuki Hosoi, Tokorozawa, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A method of recording the travel locus data for an on-board navigation system for motor vehicles stores, at the time of storing data of each location of roads in maps in numberical form, index numbers, which are allotted in sequence to particular locations on the road for each road, together with map numbers each of which is allotted to each map and path numbers each of which is allotted to each road within each map. When the vehicle is running, the map number and the path number are monitored while the present location of the the vehicle is being recognized, and a previous map number, a previous path number and a previous index number are memorized if the present map number is different from the previous map number or the present path number is different from the previous path number. Distinctive point numbers which are allotted to particular locations on the road are also used instead of the path numbers and index numbers. Thus, the amount of data in memorizing the travel locus data is considerably reduced.