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Priority claimed from JP56113901Aexternal-prioritypatent/JPS5815324A/ja
Priority claimed from JP56183510Aexternal-prioritypatent/JPS5884534A/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP82303802Aexternal-prioritypatent/EP0070734B2/de
Application grantedgrantedCritical
Publication of ATE30287T1publicationCriticalpatent/ATE30287T1/de