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Priority claimed from FR6926403Aexternal-prioritypatent/FR2055849A5/fr
Priority claimed from FR6932263Aexternal-prioritypatent/FR2058705A6/fr
Application filed by Guenot Jean G FfiledCriticalGuenot Jean G F
Publication of BE753360ApublicationCriticalpatent/BE753360A/xx
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
