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Priority claimed from DEV13419Aexternal-prioritypatent/DE1154738B/en
Priority claimed from DEV13924Aexternal-prioritypatent/DE1232852B/en
Application filed by Ver Baubeschlag Gretsch CofiledCriticalVer Baubeschlag Gretsch Co
Publication of BE573145ApublicationCriticalpatent/BE573145A/en