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Priority claimed from CH778660Aexternal-prioritypatent/CH381625A/de
Priority claimed from FR866608Aexternal-prioritypatent/FR1344165A/fr
Application filed by Laurent Freres Et Beau Frere EfiledCriticalLaurent Freres Et Beau Frere E
Publication of BE619166ApublicationCriticalpatent/BE619166A/fr