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Priority claimed from DEK1636Dexternal-prioritypatent/DE867900C/de
Priority claimed from DEK161591Dexternal-prioritypatent/DE753655C/de
Application filed by Kortenbach & Rauh KgfiledCriticalKortenbach & Rauh Kg
Publication of CH225469ApublicationCriticalpatent/CH225469A/de