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.)
Shimada Rika Kogyo KK
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
Shimada Rika Kogyo KK
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, Shimada Rika Kogyo KKfiledCriticalNippon Telegraph and Telephone Corp
Priority to JP8238282ApriorityCriticalpatent/JPS58200639A/ja
Publication of JPS58200639ApublicationCriticalpatent/JPS58200639A/ja
Publication of JPS632501B2publicationCriticalpatent/JPS632501B2/ja