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G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
G09F13/00—Illuminated signs; Luminous advertising
G09F13/34—Illuminated signs; Luminous advertising with light sources co-operating with movable members, e.g. with shutters to cover or uncover the light source
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Engineering & Computer Science
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Theoretical Computer Science
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FR36643D1929-02-021929-02-02Appareil pour publicité par machine parlante à actionnement automatique
ExpiredFR36643E
(fr)