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Publication of FR42001EpublicationCriticalpatent/FR42001E/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
G03B11/00—Filters or other obturators specially adapted for photographic purposes
Landscapes
Physics & Mathematics
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FR42001D1932-06-241932-06-24écrans pour émission de lumière blanche inactinique sous l'action d'une source lumineuse quelconque
ExpiredFR42001E
(fr)