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FILM FIRE PREVENTION AND MOTION PICTURE EQUIPMENT
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FILM FIRE PREVENTION AND MOTION PICTURE EQUIPMENT
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Application filed by FILM FIRE PREVENTION AND MOTION PICTURE EQUIPMENTfiledCriticalFILM FIRE PREVENTION AND MOTION PICTURE EQUIPMENT
Application grantedgrantedCritical
Publication of FR482959ApublicationCriticalpatent/FR482959A/fr
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
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR482959D1916-09-231916-09-23Perfectionnements aux cinématographes
ExpiredFR482959A
(fr)