US PATENT SUBCLASS 340 / 563
.~.~.~.~.~ With bridge

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
540  DF  .~ Specific condition {18}
541  DF  .~.~ Intrusion detection {8}
561  DF  .~.~.~ Disturbance of electric field {1}
562  DF  .~.~.~.~ Capacitance {2}
563.~.~.~.~.~ With bridge

DEFINITION

Classification: 340/563

With bridge:

(under subclass 562) Subject matter wherein the capacitance change sensing system is a bridge circuit.