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 JP2289875Aexternal-prioritypatent/JPS5197911A/ja
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Application grantedgrantedCritical
Publication of AU1143076ApublicationCriticalpatent/AU1143076A/en
Publication of AU492799B2publicationCriticalpatent/AU492799B2/en