US PATENT SUBCLASS 340 / 641
.~.~.~ Signalling light element

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.~.~.~ Signalling light element {2}
642  DF  .~.~.~.~> Plural bulbs or filaments
643  DF  .~.~.~.~> Thermal or magnetic current sensors

DEFINITION

Classification: 340/641

Signalling light element:

(under subclass 635) Subject matter wherein the monitored device is an electric signalling light.

(1) Note. Any claimed signalling function is sufficient for classification herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

458, for a light monitoring system in a specified vehicle.

SEE OR SEARCH CLASS

315, Electric Lamp and Discharge Devices: Systems,

88+, for automatic filament substitution; subclass 120 for a nonsignalling lamp system having an indicator and an automatic shunt or cut-out; and subclasses 129+ for a nonsignalling; e.g., illuminating, lamp system with indicators. 324, Electricity: Measuring and Testing,

403, for lamp testing.