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:
Nov. 13, 2012
Filed:
Jun. 04, 2009
Osamu Tomobe, Mito, JP;
Yukihiro Kawamata, Hitachi, JP;
Yukio Miyazaki, Hitachinaka, JP;
Takayoshi Shimokawa, Yokohama, JP;
Osamu Tomobe, Mito, JP;
Yukihiro Kawamata, Hitachi, JP;
Yukio Miyazaki, Hitachinaka, JP;
Takayoshi Shimokawa, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Clarion Co., Ltd., Saitama-shi, JP;
Abstract
A navigation device receives a differential map data from a map delivery server via a communication line. The map delivery server checks whether there is a new intersection on a navigation route searched by the navigation device after updating a map data. The navigation device acquires a differential map data containing the intersection from the map delivery server. Then, an update map data selection section determines whether the intersection can be updated in time. An update order determination section updates the differential map data which can be updated in time in ascending order of time required to reach the intersection.