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Priority claimed from JP62059669Aexternal-prioritypatent/JPS63225965A/ja
Priority claimed from JP62059670Aexternal-prioritypatent/JPS63225983A/ja
Priority claimed from JP62302060Aexternal-prioritypatent/JP2817878B2/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP88302158Aexternal-prioritypatent/EP0283221B1/de
Application grantedgrantedCritical
Publication of ATE95003T1publicationCriticalpatent/ATE95003T1/de