US Patent 7227446 Electronic key system for entry objects

Patent 7227446 was granted and assigned to Denso on June, 2007 by the United States Patent and Trademark Office.

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Patent Citations Received

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US Patent D1015119 Electronic key

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Patent Inventor Names

Ifushi Shimonomoto0

Takeshi Kumazaki0

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Patent abstract

An electronic key system for an entry object such as a vehicle is comprised of a portable device and an in-object device. The portable device has a device body and an emergency key detachably accommodated in the device body. The emergency key has a transponder, which is separate from a transponder provided in the device body. The transponder is for verifying the authority of registration of an additional portable device, while the transponder is for verifying the authority of vehicle control. The device body is also capable of detachably accommodating an emergency key which has no transponder.

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Official Website

https://pdfpiw.uspto.gov/.piw?Docid=072274460

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