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Publication of FR397806ApublicationCriticalpatent/FR397806A/fr
E05B13/00—Devices preventing the key or the handle or both from being used
E05B13/04—Devices preventing the key or the handle or both from being used shaped as fork-like implements grasping and fixing the key or a handle, e.g. a thumb-turn
FR397806D1908-12-221908-12-22Pièce de sureté pour serrure, destinée à empecher l'ouverture arbitraire ou frauduleuse des portes
ExpiredFR397806A
(fr)