Stylus for handwriting identification
May 23, 2011. 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 Re29765 3891555 3906444 Writing instrument employing adjustable housing carrying strain gage and removable reservoir Input apparatus for dynamic signature verification systems Pressure-sensitive writing stylus Data input pen for Signature Verification Method and apparatus for dynamic signature verification Digitizer stylus with pressure transducer Device for sensing loads InventorApplicationNo. 704761 filed on 05/23/1991US Classes:178/19.04, Pressure stylus73/862.68, By measuring electrical properties382/121, Sensing pressure only382/314Sensing mechanism in stylusExaminersPrimary: Schreyer, Stafford D.Attorney, Agent or FirmForeign Patent References
International ClassG08C 021/00AbstractA stylus formed of a shaft containing pressure sensors and useful in signature verification and in identification of individuals. The pressure sensors are imbedded in and integral with the shaft of the stylus at a predetermined distance from the tip used for writing. The sensors are preferably disposed in an annulus and located in each of four quadrants surrounding the shaft enabling three-axis pressure detection.Other References
Field of SearchBy measuring electrical properties | |
