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.)
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Nippon Electric Co Ltd
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 Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co LtdfiledCriticalNippon Telegraph and Telephone Corp
Priority to JP14682380ApriorityCriticalpatent/JPS5772222A/ja
Publication of JPS5772222ApublicationCriticalpatent/JPS5772222A/ja
Publication of JPS6311728B2publicationCriticalpatent/JPS6311728B2/ja