Legal status (The legal status 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 status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nittetsu Mining Co Ltd
Original Assignee
Nittetsu Mining Co Ltd
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
Application filed by Nittetsu Mining Co LtdfiledCriticalNittetsu Mining Co Ltd
Priority to JP49142005ApriorityCriticalpatent/JPS5248364B2/ja
Publication of JPS5169801ApublicationCriticalpatent/JPS5169801A/ja
Publication of JPS5248364B2publicationCriticalpatent/JPS5248364B2/ja