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:
Feb. 05, 2008
Filed:
Nov. 04, 2004
Kiyokazu Ohtaki, Aichi, JP;
Toru Maeda, Aichi, JP;
Hisashi Kato, Aichi, JP;
Akiyoshi Osumi, Aichi, JP;
Takeshi Kumazaki, Okazaki, JP;
Ifushi Shimonomoto, Okazaki, JP;
Toshio Shimomura, Chiryu, JP;
Yoshinori Fukuoka, Toyota, JP;
Koichi Masamura, Toyota, JP;
Kiyokazu Ohtaki, Aichi, JP;
Toru Maeda, Aichi, JP;
Hisashi Kato, Aichi, JP;
Akiyoshi Osumi, Aichi, JP;
Takeshi Kumazaki, Okazaki, JP;
Ifushi Shimonomoto, Okazaki, JP;
Toshio Shimomura, Chiryu, JP;
Yoshinori Fukuoka, Toyota, JP;
Koichi Masamura, Toyota, JP;
Kabushiki Kaisha Tokai Rika Denki Seisakusho, Aichi, JP;
Denso Corporation, Aichi-ken, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
A vehicle security device for improving the security level of a vehicle. The vehicle security device is connected to an engine and communicates with a portable device. A smart ECU performs a first coded communication to establish mutual authentication with the portable device. An ID code box is connected to the smart ECU, has a first code and a second code, and does not communicate with the portable device. The ID code box performs a second coded communication using the first code to establish a second mutual authentication with the smart ECU. An engine ECU performs a third coded communication using the second code to establish a third mutual authentication with the ID code box. The engine ECU enables the engine to be started when every one of the first, second, and third mutual authentications are established.