Key-touch sensor and method of manufacture
Patent 4794366 Issued on December 27, 1988. Estimated Expiration Date: 
November 10, 2006. 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.
November 10, 2006. 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 ReferencesPressure-sensitive electrically conductive elastomeric composition Electronic pressure sensitive transducer apparatus Device for controlling a circuit Flexible force sensor Graphite fiber tactile sensor Flexible force sensor Patent #: 4503705 InventorAssigneeApplicationNo. 06/929557 filed on 11/10/1986US Classes:338/114, Deformable29/620, Coating resistive material on a base338/99Surfaces pressed together (e.g., compressible type)ExaminersPrimary: Goldberg, E. A.Assistant: Lateef, M. M. International ClassesH01H 13/702 (20060101)H01H 13/70 (20060101) G01L 1/20 (20060101) H01C 10/10 (20060101) H01C 10/00 (20060101) Foreign Application Priority Data1985-11-15 JPAbstractA key-touch sensor has an electric circuit formed on a first electrically insulating substrate covered with a carbon electrode, an electric circuit formed on a second electrically insulating substrate covered with a carbon electrode which is opposed to the electric circuit on the first substrate across a gap, and a pressure-sensitive electroconductive layer deposited to at least one of the first or second substrates and disposed to fill the gap. | |
