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Priority claimed from JP59211035Aexternal-prioritypatent/JPS6189720A/ja
Priority claimed from JP1985047970Uexternal-prioritypatent/JPH0337063Y2/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP85307202Aexternal-prioritypatent/EP0178157B1/de
Application grantedgrantedCritical
Publication of ATE59246T1publicationCriticalpatent/ATE59246T1/de