Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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USINES PEARSON
Original Assignee
USINES PEARSON
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Application filed by USINES PEARSONfiledCriticalUSINES PEARSON
Application grantedgrantedCritical
Publication of FR662609ApublicationCriticalpatent/FR662609A/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
G03B27/34—Means for automatic focusing therefor
G03B27/36—Means for automatic focusing therefor by mechanical connections, e.g. by cam, by linkage
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR662609D1928-10-201928-10-20Appareil de reproduction photographique permettant l'agrandissement ou la réductiondes clichés
ExpiredFR662609A
(fr)