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:
Mar. 30, 2010
Filed:
Apr. 27, 2005
Masaaki Tanizaki, Nishitokyo, JP;
Atsushi Hiroike, Kawagoe, JP;
Shigeru Shimada, Kodaira, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An updated part of map data is delivered while suppressing unwanted communication traffic and preventing contradiction in the updated map. A map delivering server () comprises a map data storage section () storing link data including the update dates and times and update infection range for each link, a network IF section () for receiving from a navigation terminal () a map delivery request containing the requested area of map delivery and the previous request data and time of map delivery of the requested area, and a map element search section () for searching the map data storage section () for the link data associated with the update infection range including the link at least a part of which belongs to the requested area of the map delivery request and associated with the update date and time later than the previous request date and time contained in the map delivery request. The link data found by the map element search section () is sent to the navigation terminal () through the network IF section ().