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Publication of FR994871ApublicationCriticalpatent/FR994871A/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
G03B27/00—Photographic printing apparatus
G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
G03B27/46—Projection printing apparatus, e.g. enlarger, copying camera for automatic sequential copying of different originals, e.g. enlargers, roll film printers
G03B27/47—Projection printing apparatus, e.g. enlarger, copying camera for automatic sequential copying of different originals, e.g. enlargers, roll film printers at different positions of the same sheet, e.g. microfiche
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FR994871D1945-02-121945-02-12Perfectionnements apportés aux procédés et appareils pour la reproduction et la diffusion de documents
ExpiredFR994871A
(fr)
Perfectionnements apportés aux procédés et appareils pour transmissions du genre de celles comprenant une amplification bilatérale, notamment pour téléphonie haut-parleur