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Priority claimed from JP19957783Aexternal-prioritypatent/JPS6091727A/en
Priority claimed from JP19957683Aexternal-prioritypatent/JPS6091726A/en
Priority claimed from JP20887883Aexternal-prioritypatent/JPS60100831A/en
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP84112899Aexternal-prioritypatent/EP0141386B1/en
Application grantedgrantedCritical
Publication of ATE61502T1publicationCriticalpatent/ATE61502T1/en