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. 20, 2004
Filed:
Jul. 25, 2002
Hiroshi Miyahara, Tokyo-to, JP;
Other;
Abstract
In a satellite navigation system, map data stored in a server is partially updateable. The map data is produced so that they are divided into a plurality of sets of map data mutually independent set by set, and stored in the server. The map data can be updated in the server every set of the divided map data, according to necessities. The map data is formed into a layered structure composed of data of layers, blocks, and objects. Only one or more sets of map data that have been updated are transmitted to a navigating terminal. In the navigating terminal, map data for navigation is updated using the received one or more sets of map data. It is sufficient that only one or more sets of map data that has been updated are delivered from the server to each terminal.