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
Hitachi Elevator Service Co Ltd
Original Assignee
Hitachi Ltd
Hitachi Elevator Service 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, Hitachi Elevator Service Co LtdfiledCriticalHitachi Ltd
Priority to JP1302581ApriorityCriticalpatent/JPS57130669A/ja
Publication of JPS57130669ApublicationCriticalpatent/JPS57130669A/ja
Publication of JPS5758507B2publicationCriticalpatent/JPS5758507B2/ja