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JUAN LUPO
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JUAN LUPO
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Publication date
Application filed by JUAN LUPOfiledCriticalJUAN LUPO
Application grantedgrantedCritical
Publication of FR420020ApublicationCriticalpatent/FR420020A/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
(AREA)
General Physics & Mathematics
(AREA)
FR420020D1910-09-031910-09-03
Improvements to phono-cinematographic devices
ExpiredFR420020A
(en)