Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from AT182153Dexternal-prioritypatent/AT182153B/de
Application filed by Bbc Brown Boveri & CiefiledCriticalBbc Brown Boveri & Cie
Application grantedgrantedCritical
Publication of AT185428BpublicationCriticalpatent/AT185428B/de