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Application filed by Birger RamstadfiledCriticalBirger Ramstad
Priority to NO902448ApriorityCriticalpatent/NO172466C/en
Publication of NO902448D0publicationCriticalpatent/NO902448D0/en
Publication of NO902448LpublicationCriticalpatent/NO902448L/en
Publication of NO172466BpublicationCriticalpatent/NO172466B/en
Publication of NO172466CpublicationCriticalpatent/NO172466C/en