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DEMARIA FRERES SOC
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DEMARIA FRERES SOC
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Application filed by DEMARIA FRERES SOCfiledCriticalDEMARIA FRERES SOC
Application grantedgrantedCritical
Publication of FR338654ApublicationCriticalpatent/FR338654A/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
G03B9/00—Exposure-making shutters; Diaphragms
G03B9/08—Shutters
G03B9/28—Roller blind or flexible plate
G03B9/32—Double blind
G03B9/34—Double blind with adjustable slot; with mechanism controlling relative movement of blinds to form slot
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR338654D1903-12-081903-12-08Obturateur de plaque pour appareils photographiques
ExpiredFR338654A
(fr)