Patent ID: 7148801

Claim:
A system comprising: a first locator module comprising: a first memory unit operable to store one or more first address codes; a first transmitter operable to wirelessly transmit a locator signal, wherein the locator signal includes a first address code; a first receiver operable to receive a return signal transmitted by a transceiver module; one or more antennas operably connectable to the first transmitter and the first receiver; and a first control unit operable to determine a relative direction of the transceiver module from the first locator module; and the transceiver module comprising: a second memory unit operable to store a second address code; a second receiver operable to receive the locator signal transmitted from the first locator module; a second transmitter operable to wirelessly transmit the return signal; a second control unit operable to compare the first address code transmitted by the first locator module with the second address code, and activate the second transmitter to transmit the return signal if the two codes are the same; and a timer operable to activate the second receiver and second control unit.