Patterned conductive ink touch panel
Patent 4625075 Issued on November 25, 1986. Estimated Expiration Date: 
September 25, 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.
September 25, 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 References 2000446 3304612 3522664 3591718 3699439 3798370 3806912 3894183 3914548 Graphical data entry pad InventorAssigneeApplicationNo. 06/654374 filed on 09/25/1984US Classes:178/18.03Writing digitizer padExaminersPrimary: Schreyer, Stafford D.Attorney, Agent or FirmInternational ClassG06F 3/033 (20060101)AbstractAn analog touch panel comprising two flexible elements, each comprising a flexible membrane coated with a thin layer of conductive material. The elements are oriented so that the conductive coatings are facing each other when the touch panel is assembled. A network of diametrically opposite segmented busbars is formed on the conductive surface of each membrane by screening a conductive ink thereon. Patterned conductive trace members electrically couple the busbars to a conductive trunk, the tail end of which terminates at a connector device. The traces are patterned in a manner such that compensation is provided for positionally caused differences in resistance which otherwise would occur due to the use of conductive inks.Other References
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