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Priority claimed from JP62315791Aexternal-prioritypatent/JP2526949B2/ja
Priority claimed from JP31579087Aexternal-prioritypatent/JP2621261B2/ja
Priority claimed from JP31578887Aexternal-prioritypatent/JP2576551B2/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP88310064Aexternal-prioritypatent/EP0321077B1/de
Application grantedgrantedCritical
Publication of ATE102383T1publicationCriticalpatent/ATE102383T1/de