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Priority claimed from JP61197311Aexternal-prioritypatent/JPS6353746A/ja
Priority claimed from JP13577187Aexternal-prioritypatent/JPS63300476A/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP87111822Aexternal-prioritypatent/EP0261384B1/de
Application grantedgrantedCritical
Publication of ATE78359T1publicationCriticalpatent/ATE78359T1/de