Patent ID: 6947755

Claim:
A system for determining the location of an object equipped with a tracking device capable of placing a wireless telephone call, the system comprising: a mobile switching center connected to a telephone network; at least one base station, wherein the at least one base station is in communication with the mobile switching center, a plurality of wireless transmission antennas, wherein each wireless transmission antenna is in communication with one base station; a location processor, the location processor being in communication with the mobile switching center, wherein the location processor is capable of determining the location of the radiotelephone through triangulation calculation; a plurality of radio direction finding devices, each radio direction finding device being installed adjacent one wireless transmission antenna; a monitoring center in communication with the monitoring center and a data network; a plurality of database servers in communication with the data network; and a tracking device installed on the object, wherein the tracking device is capable of initiating and receiving wireless telephone calls to and from the monitoring center.