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
Original Assignee
Hitachi Ltd
Filing date
Publication date
Priority claimed from JP12613576Aexternal-prioritypatent/JPS5351854A/en
Priority claimed from JP7792577Aexternal-prioritypatent/JPS5417256A/en
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Application grantedgrantedCritical
Publication of AU2992677ApublicationCriticalpatent/AU2992677A/en
Publication of AU494734B2publicationCriticalpatent/AU494734B2/en