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Priority claimed from JP59230964Aexternal-prioritypatent/JPH0795842B2/ja
Priority claimed from JP806585Aexternal-prioritypatent/JPS61168101A/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP85307906Aexternal-prioritypatent/EP0180477B1/de
Application grantedgrantedCritical
Publication of ATE61185T1publicationCriticalpatent/ATE61185T1/de