US PATENT SUBCLASS 324 / 688
.~.~.~.~ Including a guard or ground electrode

Current as of: June, 1999
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324 /   HD   ELECTRICITY: MEASURING AND TESTING

600  DF  IMPEDANCE, ADMITTANCE OR OTHER QUANTITIES REPRESENTATIVE OF ELECTRICAL STIMULUS/RESPONSE RELATIONSHIPS {8}
649  DF  .~ Lumped type parameters {6}
658  DF  .~.~ Using capacitive type measurement {10}
686  DF  .~.~.~ With a capacitive sensing means {4}
688.~.~.~.~ Including a guard or ground electrode

DEFINITION

Classification: 324/688

Including a guard or ground electrode:

(under subclass 686) Subject matter including a conducting element of offset or eliminate undesirable electrical effects.

SEE OR SEARCH THIS CLASS, SUBCLASS:

611, for spureous and parasitic signals handling in a sensor remote from the detecting circuit.