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Biometric control of equipment

  • US 7,946,483 B2
  • Filed: 03/03/2008
  • Issued: 05/24/2011
  • Est. Priority Date: 03/01/2007
  • Status: Expired due to Fees
First Claim
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1. An apparatus for allowing operation of equipment, the apparatus comprising:

  • a portable device, operable to transmit an authorization signal; and

    a base station, operable to receive the authorization signal, the base station allowing operation of the equipment as long as the authorization signal is received from the portable device,the portable device being operable to transmit the authorization signal at a first power until the authorization signal is received by the base station,the base station establishing a data link between the base station and the portable device when the authorization signal is received by the base station,the portable device then transmitting the authorization signal at a second power after the data link is established, the second power being at least fifty per cent greater than the first power.

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