Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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Physics & Mathematics
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General Physics & Mathematics
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Circuit Arrangement For Electric Light Sources In General
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Verfahren zur Vorfuehrung von Wanderschrift fuer Tag- und Nachtreklame auf einer Schauflaeche, die aus einzelnen elektrischen oder Farbklappen-Universalgebilden besteht
Einrichtung zur Sicherung des Gleichlaufs mehrerer elektrisch betriebener Vorrichtungen fuer Unterhaltungszwecke, wie eines Kinematographen, einer Sprechmaschine, eines Klaviers u. dgl.