Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority claimed from JP06108089Aexternal-prioritypatent/JP3140293B2/en
Application filed by Hitachi Building Syst Eng, Hitachi LtdfiledCriticalHitachi Building Syst Eng
Priority to SG1995000448ApriorityCriticalpatent/SG32350A1/en
Publication of SG32350A1publicationCriticalpatent/SG32350A1/en