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Priority to NO882556ApriorityCriticalpatent/NO171747C/en
Publication of NO882556D0publicationCriticalpatent/NO882556D0/en
Publication of NO882556LpublicationCriticalpatent/NO882556L/en
Publication of NO171747BpublicationCriticalpatent/NO171747B/en
Publication of NO171747CpublicationCriticalpatent/NO171747C/en