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Application filed by Sverre SyvertsenfiledCriticalSverre Syvertsen
Priority to NO822110ApriorityCriticalpatent/NO151497C/en
Publication of NO822110LpublicationCriticalpatent/NO822110L/en
Publication of NO151497BpublicationCriticalpatent/NO151497B/en
Publication of NO151497CpublicationCriticalpatent/NO151497C/en