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.)
Tohoku Electric Power Co Inc
Asahi Tec Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Asahi Malleable Iron Co Ltd
Tohoku Electric Power Co Inc
Nippon Telegraph and Telephone Corp
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 Asahi Malleable Iron Co Ltd, Tohoku Electric Power Co Inc, Nippon Telegraph and Telephone CorpfiledCriticalAsahi Malleable Iron Co Ltd
Priority to JP17549085ApriorityCriticalpatent/JPS6235413A/ja
Publication of JPS6235413ApublicationCriticalpatent/JPS6235413A/ja
Publication of JPH0252367B2publicationCriticalpatent/JPH0252367B2/ja