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Application filed by Svein Gleditsch, Arne Vadseth, Ragnar VadsethfiledCriticalSvein Gleditsch
Priority to NO841982ApriorityCriticalpatent/NO157189C/en
Publication of NO841982LpublicationCriticalpatent/NO841982L/en
Publication of NO157189BpublicationCriticalpatent/NO157189B/en
Publication of NO157189CpublicationCriticalpatent/NO157189C/en