(under subclass 257) Subject matter wherein the source of light is a solid or liquid material which emits visible light when irradiated by invisible radiation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
84, for a luminescent material combined with a source (or support therefor) of visible light.
217+, for an illuminating device having an elongated fluorescent type light source or having supports for such a light source.
263+, for light sources comprised of a gas or vapor which emits visible light when ionized by invisible radiant energy.
SEE OR SEARCH CLASS
313, Electric Lamp and Discharge Devices, particularly 483+, for fluorescent light sources, per se.
