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Priority claimed from JP60236570Aexternal-prioritypatent/JPH0762949B2/en
Priority claimed from JP60236569Aexternal-prioritypatent/JPS6297190A/en
Priority claimed from JP60242446Aexternal-prioritypatent/JPS62102494A/en
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP89200373Aexternal-prioritypatent/EP0323446B1/en
Application grantedgrantedCritical
Publication of ATE89429T1publicationCriticalpatent/ATE89429T1/en