Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP43089818Aexternal-prioritypatent/JPS523886B1/ja
Application filed by Mitsubishi Metal Mining Co LtdfiledCriticalMitsubishi Metal Mining Co Ltd
Priority to NO740342ApriorityCriticalpatent/NO133239C/no
Publication of NO133239BpublicationCriticalpatent/NO133239B/no
Publication of NO133239CpublicationCriticalpatent/NO133239C/no