Patent ID: 6721681
Filing Date: 2004-04-13
Classification: A01K,G04B,G04G

Abstract:
A chronometric location and tracking system, comprising:a locator indicating a geographic location of an item coupled to said locator; a two-way radio system activating said locator to transmit a reply signal to determine location of said locator; a base unit having at least three antennas, said base unit transmitting a first signal: a first receiver operatively coupled to and traveling with said locator, said first receiver receiving said first signal; a first transmitter operatively coupled to said first receiver, said first transmitter transmitting a reply signal when activated by said first receiver; said base unit receiving said reply signal and determining a relative position of said locator from at least one antenna; said first signal containing a timing pulse; said receiver detecting said timing pulse and providing synchronization with said first signal; and said reply signal being synchronized with said first signal and transmitted at a different frequency than said first signal such that relative distance of said locator to at least one antenna may be determined.