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.)
Nippon Steel Corp
Sumitomo Heavy Industries Ltd
Original Assignee
Sumitomo Heavy Industries Ltd
Sumitomo Metal Industries 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 Sumitomo Heavy Industries Ltd, Sumitomo Metal Industries LtdfiledCriticalSumitomo Heavy Industries Ltd
Priority to JP13242275ApriorityCriticalpatent/JPS5257022A/en
Publication of JPS5257022ApublicationCriticalpatent/JPS5257022A/en
Publication of JPS5536024B2publicationCriticalpatent/JPS5536024B2/ja