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 Kokan Koji KK
Hitachi Ltd
Japan National Railways
Original Assignee
Nippon Kokan Koji KK
Hitachi Ltd
Japan National Railways
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 Nippon Kokan Koji KK, Hitachi Ltd, Japan National RailwaysfiledCriticalNippon Kokan Koji KK
Priority to JP3248075ApriorityCriticalpatent/JPS5444543B2/ja
Publication of JPS51108554ApublicationCriticalpatent/JPS51108554A/ja
Publication of JPS5444543B2publicationCriticalpatent/JPS5444543B2/ja