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Priority claimed from DE2456213Aexternal-prioritypatent/DE2456213C2/de
Application filed by Bbc Brown Boveri & CiefiledCriticalBbc Brown Boveri & Cie
Priority claimed from AT898476Aexternal-prioritypatent/AT346302B/de
Publication of ATA844576ApublicationCriticalpatent/ATA844576A/de
Application grantedgrantedCritical
Publication of AT348623BpublicationCriticalpatent/AT348623B/de