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Priority claimed from JP59280119Aexternal-prioritypatent/JPH0799922B2/ja
Priority claimed from JP1985005717Uexternal-prioritypatent/JPH0445162Y2/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP85309555Aexternal-prioritypatent/EP0187546B1/de
Application grantedgrantedCritical
Publication of ATE64031T1publicationCriticalpatent/ATE64031T1/de