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Priority claimed from JP7222082Aexternal-prioritypatent/JPS58188315A/en
Priority claimed from JP58025815Aexternal-prioritypatent/JPH0767088B2/en
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP83104173Aexternal-prioritypatent/EP0093969B1/en
Application grantedgrantedCritical
Publication of ATE94679T1publicationCriticalpatent/ATE94679T1/en