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.)
Shinkawa Ltd
Hitachi Ltd
Original Assignee
Hitachi Ltd
Shinkawa Seisakusho Co 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 Hitachi Ltd, Shinkawa Seisakusho Co LtdfiledCriticalHitachi Ltd
Priority to JP13050975ApriorityCriticalpatent/JPS5254954A/ja
Publication of JPS5254954ApublicationCriticalpatent/JPS5254954A/ja
Publication of JPS5515071B2publicationCriticalpatent/JPS5515071B2/ja