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Publication of FR437768ApublicationCriticalpatent/FR437768A/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
G03B27/02—Exposure apparatus for contact printing
G03B27/14—Details
G03B27/28—Edge-masking devices
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR437768D1910-12-201911-12-16Dispositif pour le tirage de copies photographiques dégradées
ExpiredFR437768A
(fr)