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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Jules Richard SA Des Ets
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Jules Richard SA Des Ets
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Application filed by Jules Richard SA Des EtsfiledCriticalJules Richard SA Des Ets
Application grantedgrantedCritical
Publication of FR921187ApublicationCriticalpatent/FR921187A/en
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
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Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR921187D1945-11-061945-11-06
Autofocus device for photographic enlargers
ExpiredFR921187A
(en)