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Priority claimed from JP63053178Aexternal-prioritypatent/JPH01227260A/ja
Priority claimed from JP63203562Aexternal-prioritypatent/JP2722512B2/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP89903278Aexternal-prioritypatent/EP0358780B1/de
Application grantedgrantedCritical
Publication of ATE97759T1publicationCriticalpatent/ATE97759T1/de