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Publication of FR1028275ApublicationCriticalpatent/FR1028275A/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
G03B27/52—Details
G03B27/54—Lamp housings; Illuminating means
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Physics & Mathematics
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FR1028275D1950-11-221950-11-22Dispositif d'éclairage pour appareil de prise de vues ou d'agrandissement pour microfilms ou microfiches
ExpiredFR1028275A
(fr)