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Priority claimed from JP1980115305Uexternal-prioritypatent/JPS606938Y2/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority to AT331282ApriorityCriticalpatent/AT374612B/de
Publication of ATA331282ApublicationCriticalpatent/ATA331282A/de
Application grantedgrantedCritical
Publication of AT374612BpublicationCriticalpatent/AT374612B/de