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Application filed by Einar H RisdalfiledCriticalEinar H Risdal
Priority to NO850298ApriorityCriticalpatent/NO155655C/en
Publication of NO850298LpublicationCriticalpatent/NO850298L/en
Publication of NO155655BpublicationCriticalpatent/NO155655B/en
Publication of NO155655CpublicationCriticalpatent/NO155655C/en