Arrays of resistive elements for use in touch panels and for producing electric fields
Patent 4778951 Issued on October 18, 1988. Estimated Expiration Date: 
January 4, 2008. 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.
January 4, 2008. 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 3767858 Touch panel system and method Hand-held musical instrument and systems including a man-machine interface apparatus Patent #: 4430917 InventorsAssigneeApplicationNo. 07/140885 filed on 01/04/1988US Classes:178/18.01, Position coordinate determination for writing (e.g., writing digitizer pad, stylus, or circuitry)178/20.01Writing digitizer circuitExaminersPrimary: Schreyer, Stafford D.Attorney, Agent or FirmInternational ClassG06F 3/033 (20060101)AbstractSelected touch point locating apparatus has an array of two or more electrical touch members constituted by impedance elements coupled to a circuit for causing electric current to flow through a selected touch point as the algebraic sum of separate currents through the electrical touch members. The relative amplitudes are translated into at least two signals corresponding to the location in two axes of the selected touch point. | |
