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Priority claimed from JP58201586Aexternal-prioritypatent/JPS6093669A/ja
Priority claimed from JP58217384Aexternal-prioritypatent/JPS60109089A/ja
Priority claimed from JP58251875Aexternal-prioritypatent/JPS60138766A/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP84307388Aexternal-prioritypatent/EP0143554B1/de
Application grantedgrantedCritical
Publication of ATE41073T1publicationCriticalpatent/ATE41073T1/de