(under subclass 541) Sign in which the message thereon is visible due to light not ascribable directly to incandescence, e.g., signs which glow in the dark.
SEE OR SEARCH CLASS
250, Radiant Energy,
458.1+, for the irradiation of fluorescent and phosphorescent devices, and subclasses 483.1+ for fluorescent and phosphorescent devices.
252, Compositions,
646, for fluorescent and phosphorescent compositions.
