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Application filed by Bjarne Birkeland, Thor Erik ThorbjoernsenfiledCriticalBjarne Birkeland
Priority to NO791036ApriorityCriticalpatent/NO143325C/no
Publication of NO143325BpublicationCriticalpatent/NO143325B/no
Publication of NO791036LpublicationCriticalpatent/NO791036L/no
Publication of NO143325CpublicationCriticalpatent/NO143325C/no