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Priority claimed from JP56076231Aexternal-prioritypatent/JPS57191982A/ja
Priority claimed from JP56077181Aexternal-prioritypatent/JPS57191986A/ja
Application filed by Matsushita Electric Industrial Co LtdfiledCriticalMatsushita Electric Industrial Co Ltd
Priority claimed from EP82901435Aexternal-prioritypatent/EP0079386B1/de
Application grantedgrantedCritical
Publication of ATE21800T1publicationCriticalpatent/ATE21800T1/de