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Identification system

  • US 6,450,816 B1
  • Filed: 06/18/1998
  • Issued: 09/17/2002
  • Est. Priority Date: 03/09/1998
  • Status: Expired due to Term
First Claim
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1. 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.

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