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Priority claimed from SE03410/71Aexternal-prioritypatent/SE357812B/xx
Priority claimed from GB5489871Aexternal-prioritypatent/GB1378863A/en
Priority claimed from NO86672Aexternal-prioritypatent/NO132970C/no
Publication of NO751519LpublicationCriticalpatent/NO751519L/no
Application filed by Bjoerklund Curt ArnoldfiledCriticalBjoerklund Curt Arnold