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Priority claimed from NO833433Aexternal-prioritypatent/NO156679C/no
Publication of NO860317LpublicationCriticalpatent/NO860317L/no
Application filed by Soennichsen RoervalseverkfiledCriticalSoennichsen Roervalseverk
Priority to NO86860317ApriorityCriticalpatent/NO158725C/no
Publication of NO158725BpublicationCriticalpatent/NO158725B/no
Publication of NO158725CpublicationCriticalpatent/NO158725C/no