US Patent 6838987 Vehicle locating system
Patent 6838987 was granted and assigned to LG on January, 2005 by the United States Patent and Trademark Office.
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A vehicle locating system, comprising a hand-held transponder in communication with a vehicle-installed transponder. The hand-held transponder is carried by a user upon exiting a vehicle. The vehicle-installed transponder remains within the vehicle. The hand-held transponder includes an activation signal generator and a homing signal receiver. Correspondingly, the vehicle-installed transponder includes an activation signal receiver and a homing signal generator. Upon receipt of an activation signal from the hand-held transponder, the homing signal generator emits a homing signal which is detected by the homing signal receiver located within the hand-hold transponder. A signal strength controlled modulator causes a speaker within the hand-held transponder to emit sound and also causes a light emitting diode to emit light, such that the period of the emitted sound and light is proportional to the distance between the hand-held transponder and the vehicle-installed transponder, thereby allowing a user to easily locate the vehicle.
US Patent 6838987 Vehicle locating system
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