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- Google Patents
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 JP5220576Aexternal-prioritypatent/JPS52135607A/en
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Application grantedgrantedCritical
Publication of AU491105B2publicationCriticalpatent/AU491105B2/en
Publication of AU2499777ApublicationCriticalpatent/AU2499777A/en