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.)
Hitachi Ltd
Japan National Railways
Nippon Kokuyu Tetsudo
Original Assignee
Hitachi Ltd
Japan National Railways
Nippon Kokuyu Tetsudo
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 Hitachi Ltd, Japan National Railways, Nippon Kokuyu TetsudofiledCriticalHitachi Ltd
Priority to JP9222381ApriorityCriticalpatent/JPS57209462A/en
Publication of JPS57209462ApublicationCriticalpatent/JPS57209462A/en
Publication of JPS6142665B2publicationCriticalpatent/JPS6142665B2/ja