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ANTOINE DELAUZUN
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ANTOINE DELAUZUN
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Application filed by ANTOINE DELAUZUNfiledCriticalANTOINE DELAUZUN
Application grantedgrantedCritical
Publication of FR506348ApublicationCriticalpatent/FR506348A/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
G03B21/00—Projectors or projection-type viewers; Accessories therefor
G03B21/14—Details
G03B21/18—Fire preventing or extinguishing
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Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR506348A1919-07-191919-07-19
Safety device system for cinematograph installations
ExpiredFR506348A
(en)