Legal status (The legal status 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 status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Toshiba Corp
Nippon Telegraph and Telephone Corp
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
Application filed by Toshiba Corp, Nippon Telegraph and Telephone CorpfiledCriticalToshiba Corp
Priority to JP62225828ApriorityCriticalpatent/JP2558733B2/ja
Publication of JPS6468140ApublicationCriticalpatent/JPS6468140A/ja
Application grantedgrantedCritical
Publication of JP2558733B2publicationCriticalpatent/JP2558733B2/ja