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.)
SHIMIZU SANGYO KK
Hitachi Ltd
Original Assignee
SHIMIZU SANGYO KK
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 SHIMIZU SANGYO KK, Hitachi LtdfiledCriticalSHIMIZU SANGYO KK
Priority to JP5871980ApriorityCriticalpatent/JPS56157767A/en
Publication of JPS56157767ApublicationCriticalpatent/JPS56157767A/en