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Publication date
Priority claimed from NO860041Aexternal-prioritypatent/NO860041L/no
Application filed by Norsk Hydro AsfiledCriticalNorsk Hydro As
Priority to NO870033ApriorityCriticalpatent/NO870033L/no
Publication of NO870033D0publicationCriticalpatent/NO870033D0/no
Publication of NO870033LpublicationCriticalpatent/NO870033L/no