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:
Jun. 07, 2022
Filed:
Oct. 25, 2017
Applicant:
Kabushiki Kaisha Tokai Rika Denki Seisakusho, Aichi, JP;
Inventors:
Assignee:
KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO, Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60R 25/24 (2013.01); G01S 13/08 (2006.01); H04Q 9/00 (2006.01); E05B 49/00 (2006.01); H04W 12/64 (2021.01); B60R 25/20 (2013.01);
U.S. Cl.
CPC ...
B60R 25/24 (2013.01); E05B 49/00 (2013.01); G01S 13/08 (2013.01); H04Q 9/00 (2013.01); H04W 12/64 (2021.01); B60R 25/2072 (2013.01); B60R 2325/108 (2013.01);
Abstract
An electronic key system determines that legitimate communication has been performed on the basis of conditions including that a measured distance from a ranging request unit to a ranging response unit measured on the basis of a ranging request signal and a ranging response signal is within a threshold range that is set on the basis of the distance from a communication area of a transmission antenna where an electronic key is determined to be located by a key location determination unit to one of either the ranging request unit or the ranging response unit that is provided in an on-board device.