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Priority claimed from JP62124709Aexternal-prioritypatent/JP2590882B2/ja
Priority claimed from JP62231762Aexternal-prioritypatent/JP2605734B2/ja
Priority claimed from JP62233325Aexternal-prioritypatent/JP2605735B2/ja
Priority claimed from JP62239460Aexternal-prioritypatent/JP2621224B2/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP88304544Aexternal-prioritypatent/EP0292284B1/de
Application grantedgrantedCritical
Publication of ATE99821T1publicationCriticalpatent/ATE99821T1/de