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Priority claimed from JP22801089Aexternal-prioritypatent/JP2761256B2/en
Application filed by Toto LtdfiledCriticalToto Ltd
Priority claimed from EP90116700Aexternal-prioritypatent/EP0415432B1/en
Application grantedgrantedCritical
Publication of ATE87688T1publicationCriticalpatent/ATE87688T1/en