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 JP63233432Aexternal-prioritypatent/JPH0699099B2/en
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to SG116693ApriorityCriticalpatent/SG116693G/en
Publication of SG116693GpublicationCriticalpatent/SG116693G/en