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
Priority claimed from JP11171778Aexternal-prioritypatent/JPS5539605A/ja
Priority claimed from JP11172378Aexternal-prioritypatent/JPS5538677A/ja
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to IN951/CAL/81ApriorityCriticalpatent/IN151964B/en
Priority to IN951/CAL/81Aprioritypatent/IN151963B/en
Publication of IN151981BpublicationCriticalpatent/IN151981B/en