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Publication date
Application filed by Vilhar BozidarfiledCriticalVilhar Bozidar
Publication of CH253268ApublicationCriticalpatent/CH253268A/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
G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
G03B13/02—Viewfinders
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
CH253268D1946-08-071946-08-07Viseur amovible pour appareil photographique à lentille d'approchement.
CH253268A
(fr)