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Application filed by Svein GleditschfiledCriticalSvein Gleditsch
Priority to NO893650ApriorityCriticalpatent/NO169860C/en
Publication of NO893650D0publicationCriticalpatent/NO893650D0/en
Publication of NO893650LpublicationCriticalpatent/NO893650L/en
Publication of NO169860BpublicationCriticalpatent/NO169860B/en
Publication of NO169860CpublicationCriticalpatent/NO169860C/en