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Priority claimed from DE1778094Aexternal-prioritypatent/DE1778094C3/de
Application filed by Fraenk Isolierrohr & MetallfiledCriticalFraenk Isolierrohr & Metall
Priority to NO405473ApriorityCriticalpatent/NO130932C/no
Publication of NO130932BpublicationCriticalpatent/NO130932B/no
Publication of NO130932CpublicationCriticalpatent/NO130932C/no