US PATENT SUBCLASS 382 / 120
.~.~.~ Sensing pressure together with speed or acceleration

Current as of: June, 1999
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382 /   HD   IMAGE ANALYSIS

100  DF  APPLICATIONS {20}
115  DF  .~ Personnel identification (e.g., biometrics) {5}
119  DF  .~.~ Using a signature {4}
120.~.~.~ Sensing pressure together with speed or acceleration

DEFINITION

Classification: 382/120

Sensing pressure together with speed or acceleration:

(under subclass 119) Subject matter wherein the pressure characteristics of the writing sample are used in combination with either speed (velocity, that is, the first derivative of the values of the pen movement) or acceleration (change in velocity, that is, the second derivative of the values of the pen movement) characteristic to identify the person doing the writing.