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GABRIEL GALINOU
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GABRIEL GALINOU
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Application filed by GABRIEL GALINOUfiledCriticalGABRIEL GALINOU
Application grantedgrantedCritical
Publication of FR456917ApublicationCriticalpatent/FR456917A/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
G03B21/54—Accessories
G03B21/56—Projection screens
G03B21/60—Projection screens characterised by the nature of the surface
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR456917A1913-04-211913-04-21Système de cinématographe à projections multiples des images d'un meme film
ExpiredFR456917A
(fr)