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 Service Engineering Co Ltd
Hitachi Ltd
Hitachi Industry and Control Solutions Co Ltd
Original Assignee
Hitachi Engineering Co Ltd
Hitachi Service Engineering Co Ltd
Hitachi 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 Engineering Co Ltd, Hitachi Service Engineering Co Ltd, Hitachi LtdfiledCriticalHitachi Engineering Co Ltd
Priority to JP12537979ApriorityCriticalpatent/JPS5649953A/ja
Publication of JPS5649953ApublicationCriticalpatent/JPS5649953A/ja
Publication of JPS6130705B2publicationCriticalpatent/JPS6130705B2/ja