Wireless cursor control system
Patent 4654648 Issued on March 31, 1987. Estimated Expiration Date: 
December 17, 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.
December 17, 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 ReferencesAcoustic writing combination, comprising a stylus with an associated writing tablet Cordless digital graphics input device Phased-array sound pickup apparatus Light pencil Method and apparatus for wireless cursor position control Patent #: 4578674 InventorsApplicationNo. 06/682615 filed on 12/17/1984US Classes:345/179StylusExaminersPrimary: Brigance, Gerald L.Attorney, Agent or FirmInternational ClassG06F 3/033 (20060101)AbstractA position control system is described for the control of cursor movement on a video display terminal or the like. The control system includes a wireless movable steering means which emits acoustic signals, tracking means adapted to receive the acoustic signals and determine the position of the steering means by hyperbolic triangulation, and communication means for communicating the position (either absolute position or relative movement) of the steering means to the video display terminal.Other References
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