US PATENT SUBCLASS 340 / 513
.~.~.~ Diode

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}
513.~.~.~ Diode

DEFINITION

Classification: 340/513

Diode:

(under subclass 506) Subject matter having a diode added to the primary alarm circuit by which a supervisory current may be effective.