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.)
Filing date
Publication date
Priority claimed from CH948773Aexternal-prioritypatent/CH589221A5/xx
Application filed by Bbc Brown Boveri & CiefiledCriticalBbc Brown Boveri & Cie
Priority to DK335478ApriorityCriticalpatent/DK335478A/da
Publication of DK335478ApublicationCriticalpatent/DK335478A/da