(under subclass 509) Subject matter wherein the operation of a circuit or system is modified by the approach of or slight contact with a physical object.
SEE OR SEARCH THIS CLASS, SUBCLASS:
516, for circuitry which utilizes the conversion of mechanical variations into electrical variations.
SEE OR SEARCH CLASS
340, Communications: Electrical,
407, for tactual communication circuits.
361, Electricity: Electrical Systems and Devices,
179+, for relays or solenoids responsive to proximity or contact.
