Patent ID: 6904000

Claim:
An apparatus for locating an object, said apparatus comprising of: a locating unit comprising an ultrasonic transducer means for transmitting ultrasonic waves in a direction beam manner, a radio frequency receiver means to receive a radio frequency of a predetermined characteristics, a signal strength detector means for identifying a strength of said radio frequency signals of predetermined characteristics and a means for activating a display device as a function of said identified strength of said radio frequency signals of predetermined characteristics received from said radio frequency receiver means; one or more tag units attachable to objects to be located, each tag unit comprising: an ultrasonic transducer means for converting said transmitted ultrasonic waves to alternating voltage, a power conditioner means to condition the said alternating voltages to a voltage suitable to provide electrical power to a low power radio frequency transmitter, and a radio frequency transmitter means to transmit a radio frequency signal of predetermined characteristics.