US PATENT SUBCLASS 340 / 512
.~.~.~ Pulse

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

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
501  DF  .~ With particular system function (e.g., temperature compensation, calibration) {8}
506  DF  .~.~ Alarm system supervision {7}
512.~.~.~ Pulse

DEFINITION

Classification: 340/512

Pulse:

(under subclass 506) Subject matter having electrical pulses, either from an energizing pulse source, or from some circuit means forming pulses related to an electrical alarm signal, in either the primary or supervisory circuit.