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. 01, 2005
Filed:
Apr. 25, 2003
Naoki Satoh, Odawara, JP;
Takashi Yamaguchi, Tsuchiura, JP;
Atsushi Saito, Chigasaki, JP;
Kozo Nakamura, Hitachiota, JP;
Mikio Tokuyama, Tsuchiura, JP;
Shigeo Nakamura, Odawara, JP;
Hiroyuki Kohida, Zama, JP;
Hirohisa Miyazawa, Zama, JP;
Naoki Satoh, Odawara, JP;
Takashi Yamaguchi, Tsuchiura, JP;
Atsushi Saito, Chigasaki, JP;
Kozo Nakamura, Hitachiota, JP;
Mikio Tokuyama, Tsuchiura, JP;
Shigeo Nakamura, Odawara, JP;
Hiroyuki Kohida, Zama, JP;
Hirohisa Miyazawa, Zama, JP;
Hitachi, Ltd., Tokyo, JP;
Xanavi Informatics Corporation, Kanagawa, JP;
Abstract
A vehicle-mounted information processing apparatus such as a car-navigation system detects that a key switch of the vehicle has been set up at a Lock position (i.e., the engine is stopped). After that, the apparatus performs data reproduction of data files in an order from the oldest, then re-recording the reproduced data files with no change added thereto. Here, the above-described data files, which are stored within a magnetic disk device built in the apparatus, have been not updated for a constant time-period. This re-recording prevents a data loss caused by a thermal decay in the case where the magnetic disk device is mounted inside the vehicle that is likely to have existed under a high-temperature environment for a long time-period.