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:
Jul. 05, 2016
Filed:
Dec. 13, 2013
Alps Electric Co., Ltd., Tokyo, JP;
Akira Miyazawa, Tokyo, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A passive keyless system includes an in-vehicle control unit, an in-vehicle transmitter wirelessly sending a request signal, a portable device that is activated by a battery, has a standby function of receiving a request signal, and sends an ID signal when the request signal is received, and an in-vehicle receiver receiving the ID signal. The in-vehicle control unit allows various operations of the vehicle when an authentication of the ID signal received by the in-vehicle receiver is established. When a remaining amount value of the battery is less than a reference value, the portable device can stop the standby function, can restore the standby function according to an operation using the portable device, and can stop the standby function again after the standby function is restored.