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Priority claimed from JP8538887Aexternal-prioritypatent/JP2576497B2/ja
Priority claimed from JP14817487Aexternal-prioritypatent/JP2576509B2/ja
Priority claimed from JP15834687Aexternal-prioritypatent/JP2576511B2/ja
Priority claimed from JP62158885Aexternal-prioritypatent/JPS644981A/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP88303134Aexternal-prioritypatent/EP0286412B1/de
Application grantedgrantedCritical
Publication of ATE82428T1publicationCriticalpatent/ATE82428T1/de