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.)
Filing date
Publication date
Priority claimed from JP2094029Aexternal-prioritypatent/JP2523927B2/en
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to SG394ApriorityCriticalpatent/SG394G/en
Publication of SG394GpublicationCriticalpatent/SG394G/en