(under subclass 155) Subject matter in which the illumination means is automatically enabled whenever scene light is insufficient for a proper exposure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
, FOR 719, for a foreign art collection involving automatic exposure control including artificial illumination automatically activated under low light condition.
SEE OR SEARCH CLASS
315, Electric Lamp and Discharge Devices: Systems,
307+, for automatic current or voltage regulation.
