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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LOUIS EMILE VILLAIN
Original Assignee
LOUIS EMILE VILLAIN
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Filing date
Publication date
Application filed by LOUIS EMILE VILLAINfiledCriticalLOUIS EMILE VILLAIN
Application grantedgrantedCritical
Publication of FR9422EpublicationCriticalpatent/FR9422E/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
G03B9/58—Means for varying duration of "open" period of shutter
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR9422D1908-03-301908-06-04Procédé et dispositif pour le déclenchement automatique des obturateurs photographiques
ExpiredFR9422E
(fr)