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Priority claimed from JP1793583Uexternal-prioritypatent/JPS59125702U/en
Priority claimed from JP2358983Uexternal-prioritypatent/JPS59130208U/en
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP84300799Aexternal-prioritypatent/EP0116463B1/en
Application grantedgrantedCritical
Publication of ATE34866T1publicationCriticalpatent/ATE34866T1/en