US PATENT SUBCLASS 340 / 642
.~.~.~.~ Plural bulbs or filaments

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}
635  DF  .~.~ Condition of electrical apparatus {15}
641  DF  .~.~.~ Signalling light element {2}
642.~.~.~.~ Plural bulbs or filaments

DEFINITION

Classification: 340/642

Plural bulbs or filaments:

(under subclass 641) Subject matter where plural lights are monitored.