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Priority claimed from JP60009267Aexternal-prioritypatent/JPH0797744B2/ja
Priority claimed from JP926385Aexternal-prioritypatent/JPH0652862B2/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP86300436Aexternal-prioritypatent/EP0189319B1/de
Application grantedgrantedCritical
Publication of ATE65868T1publicationCriticalpatent/ATE65868T1/de