Patent ID: 6450816
Filing Date: 2002-09-17
Classification: F41G

Abstract:
An identification system comprising:a laser device which is capable of emitting a laser beam with a first code and a laser beam with a different second code; a target device having a sensor for detecting said first and second coded laser beams from said laser device, a microprocessor for formulating a response, a laser response transmitter and a radio frequency or ultrasound response transmitter; and, receivers associated with said laser device which are collectively capable of receiving a laser response and either a radio frequency or ultrasound response from said target device; wherein said laser device initially emits said laser beam with a first code to said target device to solicit a laser response and, if said laser device does not receive a laser response from said target device within a predetermined period of time after transmission, said laser device then emits said laser beam with a second code to solicit either a radio frequency or ultrasound response.