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G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
G03B23/00—Devices for changing pictures in viewing apparatus or projectors
G03B23/08—Devices for changing pictures in viewing apparatus or projectors in which pictures are attached to a movable carrier
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FR39022D1930-08-081930-08-08Appareil pour projection cinématographique et audition phonographique synchrones
ExpiredFR39022E
(fr)
Dispositif de synchronisation entre un ou plusieurs appareils de projection cinématographiques et un ou plusieurs phonographes ou autres appareils sonores