(under subclass 286.01) Subject matter in which an electrically controlled signal board or indicator indicates the condition that exists or has existed in an associated circuit.
SEE OR SEARCH THIS CLASS, SUBCLASS:
815.47, for switchboard or panel type visual indicator for signaling and subclasses 815.01+ for group drop annunciators.
SEE OR SEARCH CLASS
116, Signals and Indicators, appropriate subclasses for nonelectric signaling.
