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Priority claimed from JP57156602Aexternal-prioritypatent/JPS5948804A/en
Priority claimed from JP19084682Aexternal-prioritypatent/JPS5982605A/en
Priority claimed from JP58011556Aexternal-prioritypatent/JPS59138185A/en
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority claimed from EP83108932Aexternal-prioritypatent/EP0103287B1/en
Application grantedgrantedCritical
Publication of ATE59925T1publicationCriticalpatent/ATE59925T1/en