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.)
Sumitomo Electric Industries Ltd
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries 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, Sumitomo Electric Industries LtdfiledCriticalNippon Telegraph and Telephone Corp
Priority to JP1989013567UpriorityCriticalpatent/JP2501203Y2/ja
Publication of JPH02105150UpublicationCriticalpatent/JPH02105150U/ja
Application grantedgrantedCritical
Publication of JP2501203Y2publicationCriticalpatent/JP2501203Y2/ja
Circuito per l'attenuazione controllata dei percorsi del parlato di trasmissione e di ricezione di un apparecchio telefonico a viva voce ed apparecchio telefonico incorporante tale circuito.