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Priority claimed from JP19853086Aexternal-prioritypatent/JP2637958B2/en
Priority claimed from JP19853186Aexternal-prioritypatent/JPH0770149B2/en
Priority claimed from JP61232512Aexternal-prioritypatent/JP2586461B2/en
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from PCT/JP1987/000557external-prioritypatent/WO1988001785A1/en
Application grantedgrantedCritical
Publication of ATE105646T1publicationCriticalpatent/ATE105646T1/en