co-operating with rotating screening means

Full Title

Illuminated signs; Luminous advertising > with light sources co-operating with movable members, e.g. with shutters to cover or uncover the light source > co-operating with rotating screening means

Classification Context

Section:

PHYSICS

Class:

EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS

Subclass:

DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS