Data input pen for Signature Verification
June 30, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3528295 3699517 Handwriting identification technique Signature verification method and apparatus Input apparatus for dynamic signature verification systems Signature verification method and apparatus utilizing both acceleration and pressure characteristics Signature verification pen Pressure sensing device and transducer arrangement Input pen assembly Apparatus for determining pen acceleration Patent #: 4345239 InventorsApplicationNo. 06/394043 filed on 06/30/1982US Classes:382/120, Sensing pressure together with speed or acceleration382/314, Sensing mechanism in stylus73/865.4ANALYZING BODILY MOVEMENT (E.G., SKILLS OR KINETICS OF HANDWRITING)ExaminersPrimary: Boudreau, Leo H.Attorney, Agent or FirmInternational ClassesB43K 8/00 (20060101)B43K 8/22 (20060101) G06K 9/22 (20060101) G06F 3/033 (20060101) G06K 9/24 (20060101) G07C 9/00 (20060101) G06K 9/00 (20060101) AbstractA writing implement having special applicability for use as a pressure and acceleration sensitive element for use in a Signature Verification System. The pen structure includes both a writing implement for making a visible record and also includes unique transducer structures for providing both acceleration and pressure data to a remotely located verification system. The pressure sensing element is axially mounted within the pen and produces pressure signals due to axial pressure on the pen tip as an individual writes. The accelerometer structure comprises a hollow tubular piezoelectric member supported at one end and having four circumferentially disposed electrodes on the outer surface thereof, which are appropriately interconnected to produce two orthogonal acceleration component signals Ax and Ay.Other References
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