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Application filed by Christian Bruns & Cie G M B HfiledCriticalChristian Bruns & Cie G M B H
Publication of CH62873ApublicationCriticalpatent/CH62873A/de
CH62873A1912-11-301912-11-30Objektivverschluß für veränderbare Belichtungsdauer mit einem Hemmwerk, um das Ablaufen des Verschlusses zu verzögern
CH62873A
(de)