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Priority claimed from JP59251273Aexternal-prioritypatent/JPS61129992A/ja
Priority claimed from JP60085237Aexternal-prioritypatent/JPS61244185A/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP85308620Aexternal-prioritypatent/EP0183540B1/de
Application grantedgrantedCritical
Publication of ATE60181T1publicationCriticalpatent/ATE60181T1/de