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发明名称
Method of and apparatus to monitor interconnected speech circuits for noise
摘要
申请公布号
US3223780(A)
申请公布日期
1965.12.14
申请号
US19610161647
申请日期
1961.12.22
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
FEGER WERNER G.
分类号
H04M3/24;H04M3/56
主分类号
H04M3/24
代理机构
代理人
主权项
地址
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