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Int Tobis Mij N V
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Int Tobis Mij N V
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Publication of FR45864EpublicationCriticalpatent/FR45864E/en
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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FR45864D1935-01-301935-01-30
Improvements to devices for recording, reproducing and copying cinematographic and sound films
ExpiredFR45864E
(en)