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.)
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Publication date
Priority claimed from JP3924278Aexternal-prioritypatent/JPS54132753A/ja
Priority claimed from IN118/CAL/79Aexternal-prioritypatent/IN151981B/en
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to IN951/CAL/81ApriorityCriticalpatent/IN151964B/en
Publication of IN151964BpublicationCriticalpatent/IN151964B/en