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Sonic/ultrasonic authentication device

  • US 7,280,970 B2
  • Filed: 05/10/2001
  • Issued: 10/09/2007
  • Est. Priority Date: 10/04/1999
  • Status: Expired due to Fees
First Claim
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1. A stand alone credit-card sized apparatus capable of receiving and processing audio signals, comprising:

  • a power source;

    an audio or visual output device;

    an input device capable of receiving human voice inputs;

    a data processing device configured to process human voice inputs received by the input device and to generate a packet of digital data indicating a result of the processing; and

    transmission circuitry adapted to modulate an audio or visual signal with the packet of digital data and transmit the modulated audio or visual signal through the output device.

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