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Priority claimed from NO833433Aexternal-prioritypatent/NO156679C/no
Application filed by Soennichsen RoervalseverkfiledCriticalSoennichsen Roervalseverk
Publication of FI884141A0publicationCriticalpatent/FI884141A0/fi
Publication of FI884141ApublicationCriticalpatent/FI884141A/fi
Application grantedgrantedCritical
Publication of FI81299BpublicationCriticalpatent/FI81299B/fi
Publication of FI81299CpublicationCriticalpatent/FI81299C/fi