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.)
Japan National Railways
Original Assignee
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 Japan National RailwaysfiledCriticalJapan National Railways
Priority to JP5918281ApriorityCriticalpatent/JPS57174590A/ja
Publication of JPS57174590ApublicationCriticalpatent/JPS57174590A/ja
Publication of JPS6144191B2publicationCriticalpatent/JPS6144191B2/ja