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Priority claimed from JP59087183Aexternal-prioritypatent/JPH0782727B2/ja
Priority claimed from JP1984074592Uexternal-prioritypatent/JPS60186573U/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP85302960Aexternal-prioritypatent/EP0160538B1/de
Application grantedgrantedCritical
Publication of ATE61148T1publicationCriticalpatent/ATE61148T1/de