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公开(公告)号：US3131258A
公开(公告)日：1964-04-28
申请号：US16114961
申请日：1961-12-21
Applicant: BELL TELEPHONE LABOR INC
Inventor： O'NEILL JR JOHN F
IPC: H03D1/18 , H04L27/08 , H04L27/14 , H04L27/144
CPC classification number: H03D1/18 , H04L27/08 , H04L27/14 , H04L27/144
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2.发明授权Remote condition monitoring circuit with ringing current actuated switch connecting twomode oscillator to telephone line 失效具有振铃电流启动开关的遥控状态监控电路，将两路振荡器连接到电话线
公开(公告)号：US3325598A
公开(公告)日：1967-06-13
申请号：US30968063
申请日：1963-09-18
Applicant: BELL TELEPHONE LABOR INC
Inventor： O'NEILL JR JOHN F
IPC: H04M11/04
CPC classification number: H04M11/04
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公开(公告)号：US3400332A
公开(公告)日：1968-09-03
申请号：US51650365
申请日：1965-12-27
Applicant: BELL TELEPHONE LABOR INC
Inventor： O'NEILL JR JOHN F , SALTZBERG BURTON R
IPC: H04L27/01
CPC classification number: H04L27/01
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