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.)
JAPANESE NATIONAL RAILWAYS<JNR>
Japan National Railways
Original Assignee
JAPANESE NATIONAL RAILWAYS<JNR>
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 JAPANESE NATIONAL RAILWAYS<JNR>, Japan National RailwaysfiledCriticalJAPANESE NATIONAL RAILWAYS<JNR>
Priority to JP7864975ApriorityCriticalpatent/JPS523457A/en
Publication of JPS523457ApublicationCriticalpatent/JPS523457A/en