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:
Aug. 30, 2005
Filed:
Apr. 23, 2003
Mitsuhiro Nimura, Okazaki, JP;
Mitsuhiro Nimura, Okazaki, JP;
Aisin Aw Co., Ltd., Anjo, JP;
Abstract
The map data may be updated on a specified area basis. This may shorten the time for updating the map data as well as lowers the cost of map data update. A navigation system comprising a data centerfor distributing map data about a designated area upon receipt of a data-distribution request; an on-board devicehaving a data storage that stores map data, for updating the map data about the designated area with new map data distributed from the data center; and wherein the map data distributed from the data center has a layered structure in which the map data in a lowest-layer represents the designated area while the map data in a higher-layer represents a wider area that includes a smaller area represented by a lower-layer map data.