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DIGITAL SIGNATURE COLLECTION AND AUTHENTICATION

  • US 20110090182A1
  • Filed: 12/23/2010
  • Published: 04/21/2011
  • Est. Priority Date: 05/25/2001
  • Status: Active Grant
First Claim
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1. A digital signature collection system comprising:

  • a first ultrasonic sensor;

    a second ultrasonic sensor mountable on a surface a distance from the first ultrasonic sensor;

    an electromagnetic sensor; and

    a pen having a pressure sensitive tip to generate a pressure signal, the pressure sensitive tip coupled to a pressure activated switch, wherein the pressure activated switch is operable to turn on an ultrasonic transmitter when pressure is applied to the pressure sensitive tip, the pen also including an ink cartridge to dispense ink, the pen being configured to transmit ultrasonic energy to the first and second ultrasonic sensors and to transmit electromagnetic energy to the electromagnetic sensor.

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