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Priority claimed from CH1471071Aexternal-prioritypatent/CH537119A/de
Application filed by Bbc Brown Boveri & CiefiledCriticalBbc Brown Boveri & Cie
Priority claimed from AT847476Aexternal-prioritypatent/AT360089B/de
Publication of ATA133176ApublicationCriticalpatent/ATA133176A/de
Application grantedgrantedCritical
Publication of AT352212BpublicationCriticalpatent/AT352212B/de