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Publication date
Application filed by Bbc Brown Boveri & CiefiledCriticalBbc Brown Boveri & Cie
Priority to NO751512ApriorityCriticalpatent/NO139423C/no
Publication of NO751512LpublicationCriticalpatent/NO751512L/no
Publication of NO139423BpublicationCriticalpatent/NO139423B/no
Publication of NO139423CpublicationCriticalpatent/NO139423C/no