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Priority claimed from DE1901135164Dexternal-prioritypatent/DE135164C/de
Application filed by Siemens AgfiledCriticalSiemens Ag
Priority to AT20179DpriorityCriticalpatent/AT20179B/de
Application grantedgrantedCritical
Publication of AT19267BpublicationCriticalpatent/AT19267B/de