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Priority claimed from DE1906215281Dexternal-prioritypatent/DE215281C/de
Application filed by Rheinische Metallw & MaschffiledCriticalRheinische Metallw & Maschf
Priority to AT49305DpriorityCriticalpatent/AT49305B/de
Application grantedgrantedCritical
Publication of AT49305BpublicationCriticalpatent/AT49305B/de