US Patent 7245210 Vehicle electronic key system
Patent 7245210 was granted and assigned to Honda on July, 2007 by the United States Patent and Trademark Office.
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A vehicle electronic key system includes a control device mounted on a vehicle and an electronic key for transmitting a response signal in response to reception of a request signal from the control device. The control device includes means for outputting a request signal to the electronic key in response to the ON operation of a main switch of the vehicle (request signal generation means, a transmission circuit, and a transmission antenna), means for detecting a response signal from the electronic key (a reception circuit and response signal matching means), and means for performing an alarm output (monitoring means, a third drive circuit, and an alarm lamp) when no response signal is detected in spite of the output of the request signal.
US Patent 07245210 Vehicle electronic key system US Patent 7245210 Vehicle electronic key system
US Patent 07245210 Vehicle electronic key system
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