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Priority claimed from JP63049993Aexternal-prioritypatent/JPH01223230A/en
Priority claimed from JP11746088Aexternal-prioritypatent/JP2592096B2/en
Priority claimed from JP13094988Aexternal-prioritypatent/JP2575182B2/en
Application filed by Toto LtdfiledCriticalToto Ltd
Priority claimed from EP89302037Aexternal-prioritypatent/EP0331461B1/en
Application grantedgrantedCritical
Publication of ATE70328T1publicationCriticalpatent/ATE70328T1/en