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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
G03B31/00—Associated working of cameras or projectors with sound-recording or sound-reproducing means
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Displays For Variable Information Using Movable Means
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Vorrichtung an Kinoprojektoren zum Synchronisieren von fernuebertragenen akustischenDarbietungen mit am Empfangsort ablaufenden zugehoerigen kinematographischen Filmen
Einrichtung zur Sicherung des Gleichlaufs mehrerer elektrisch betriebener Vorrichtungen fuer Unterhaltungszwecke, wie eines Kinematographen, einer Sprechmaschine, eines Klaviers u. dgl.