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Priority claimed from JP58139965Aexternal-prioritypatent/JPS6032141A/ja
Priority claimed from JP58140139Aexternal-prioritypatent/JPS6032142A/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP84305096Aexternal-prioritypatent/EP0133027B1/de
Application grantedgrantedCritical
Publication of ATE34243T1publicationCriticalpatent/ATE34243T1/de