Telegraphy – Systems – Position coordinate determination for writing
Reexamination Certificate
2007-10-09
2007-10-09
Jung, David (Department: 2134)
Telegraphy
Systems
Position coordinate determination for writing
C345S179000, C178S019040
Reexamination Certificate
active
09865952
ABSTRACT:
A digital signature collection and authentication system includes an ink pen having an ultrasonic transmitter that transmits ultrasonic energy to a plurality of ultrasonic receivers. A computer triangulates the location of the pen versus time to generate the signature shape, and to generate velocity and acceleration data. The pen also includes a pressure sensitive tip to record pressure applied to the pen tip. The pen also includes a higher frequency burst transmitter useful to generate a time reference, and to transmit the pressure information. The computer packetizes the shape, velocity, acceleration, and pressure data with a time stamp and an IP address or phone number, encrypts the packet and sends it to a host computer for authentication.
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Barre Michael R.
Intel Corporation
Jung David
LandOfFree
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