Stylus or pen with tactile response to user
Patent 4667182 Issued on May 19, 1987. Estimated Expiration Date: 
May 19, 2004. 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.
May 19, 2004. 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 ReferencesElectrical sensing writing pen Tactile feel device Stylus pen actuating switch Patent #: 4268730 InventorApplicationNo. 06/564252 filed on 12/22/1983US Classes:340/407.2, With input means (e.g., keyboard)178/19.01, Writing digitizer stylus345/179StylusExaminersPrimary: Caldwell, Sr., John W.Assistant: Queen, Tyrone Attorney, Agent or FirmInternational ClassG06F 3/033 (20060101)Foreign Application Priority Data1983-01-28 EPAbstractA stylus for interactive use with a graphics input tablet provides a user with a tactile response whenever the stylus tip (5) passes through the in-presence boundary of the tablet. The boundary defines the limit of the distance of the stylus above the tablet surface beyond which stylus position signals are regarded as unreliable. The tactile response is produced by a movable mass (2) within the body (1) of the stylus which is propelled by an internal mechanism (9, 10) into a lower end stop (11) as the tip passes through the in-presence boundary towards the tablet, and into an upper end stop (3) as the stylus passes through the boundary away from the tablet. The tactile response experience by a user in each case is different. In an alternative arrangement, the stylus tip (5) is attached to the moving mass (2) and arranged normally to be held retracted within the stylus body (1) but to automatically protrude from the body as the end of the stylus passes through the in-presence boundary.Other References
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