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:
Dec. 01, 2015
Filed:
Jan. 22, 2010
Kazuhiro Nakashima, Anjo, JP;
Hiroko Murakami, Toyota, JP;
Hiroki Okada, Toyota, JP;
Arinobu Kimura, Toyota, JP;
Kazuhiro Nakashima, Anjo, JP;
Hiroko Murakami, Toyota, JP;
Hiroki Okada, Toyota, JP;
Arinobu Kimura, Toyota, JP;
DENSO CORPORATION, Kariya-shi, Aichi-pref., JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, Aichi-pref., JP;
Abstract
In an in-vehicle device control system, an in-vehicle device is controlled based on a checkup result of checkup operation, in which a checkup about a portable device is performed by mutual communication of transmitting a request signal from a vehicle-side unit mounted on a vehicle and transmitting in return a response signal from the portable device in response to the request signal. If the checkup is unsuccessful, the mutual communication is performed again by switching the communication frequency to perform the checkup again. When a user operates a door lock sensor, the vehicle-side unit performs an exterior checkup first. If the checkup is successful, a communication frequency, by which the checkup was performed successfully, is stored in a memory. The vehicle-side unit sets the communication frequency stored in the memory as a communication frequency, which is to be designated to the portable device, for performing an interior checkup next time.