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 to JP63238722ApriorityCriticalpatent/JPH0755052B2/ja
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to IN785CA1989prioritypatent/IN172397B/en
Publication of IN172397BpublicationCriticalpatent/IN172397B/en