Digital signature collection and authentication
First Claim
1. An ultrasonic pen comprising:
- a pressure sensitive tip to generate a pressure signal;
an ultrasonic transmitter to transmit pulses for position determination;
a pressure activated switch coupled to the pressure sensitive tip, wherein the pressure activated switch is operable to turn on the ultrasonic transmitter when pressure is applied to the pressure sensitive tip; and
a second transmitter to transmit the pressure signal.
1 Assignment
0 Petitions
Accused Products
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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Citations
16 Claims
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1. An ultrasonic pen comprising:
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a pressure sensitive tip to generate a pressure signal; an ultrasonic transmitter to transmit pulses for position determination; a pressure activated switch coupled to the pressure sensitive tip, wherein the pressure activated switch is operable to turn on the ultrasonic transmitter when pressure is applied to the pressure sensitive tip; and a second transmitter to transmit the pressure signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A digital signature collection system comprising:
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a first ultrasonic receiver; a second ultrasonic receiver mountable on a surface a distance from the first ultrasonic receiver; a higher frequency receiver; and an ultrasonic pen having a pressure sensitive tip to generate a pressure sianal, 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 ultrasonic pen also including an ink cartridge to dispense ink, the ultrasonic pen being configured to transmit the pressure signal to the higher frequency receiver, and to transmit ultrasonic energy to the first and second ultrasonic receivers. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification