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Publication of FR444395ApublicationCriticalpatent/FR444395A/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
G03B21/26—Projecting separately subsidiary matter simultaneously with main image
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR444395D1911-12-161912-03-14Affiches coulissantes pour lanternes magiques et projecteurs cinématographiques
ExpiredFR444395A
(fr)