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Fingerprint reader using surface acoustic wave device

  • US 20040218789A1
  • Filed: 12/31/2003
  • Published: 11/04/2004
  • Est. Priority Date: 12/31/2002
  • Status: Abandoned Application
First Claim
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1. A biometric sensing system, comprising:

  • a surface acoustic wave sensor; and

    a modifier which causes the sensor to output a distorted print signal.

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