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:
Apr. 14, 2015
Filed:
Jan. 05, 2012
Applicants:
Takashi Saiki, Okazaki, JP;
Ryusuke Ishikawa, Kariya, JP;
Takeshi Kumazaki, Okazaki, JP;
Inventors:
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05D 1/00 (2006.01); B60R 25/20 (2013.01); B60R 25/00 (2013.01); G07C 9/00 (2006.01);
U.S. Cl.
CPC ...
B60R 25/2072 (2013.01); B60R 25/00 (2013.01); G07C 9/00309 (2013.01); G07C 2009/00388 (2013.01); G07C 2009/00365 (2013.01);
Abstract
A vehicle-side unit transmits a first request signal WAKE periodically toward a portable unit, and transmits a second request signal CHLG at every predetermined transmission interval specific to the vehicle-side unit upon reception of a first response signal ACK from the portable unit in response to the transmitted WAKE. The portable unit is operable with power supplied from a battery. The portable unit transmits ACK upon reception of WAKE and becomes ready for reception of CHLG at a timing CHLG is transmitted in accordance with the transmission interval specific to the vehicle-side unit.