(under subclass 223) Subject matter wherein the indicator means is, at least in part, comprised of a fluorescent, phosphoresent or radioactive substance.
SEE OR SEARCH THIS CLASS, SUBCLASS:
239+, for electro-optical timepiece displays, per se.
SEE OR SEARCH CLASS
250, Radiant Energy,
462.1+, especially subclasses 463.1+, for self-luminous dials, pointers, gauges and bands; and subclasses 483.1+ for luminescent devices not classified elsewhere.
313, Electric Lamp and Discharge Devices,
483+, for electric lamp and discharge devices with luminescent solid or liquid material.
