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经营范围
发明名称
ECHO CANCELLER WITH LIMITED AND RESIDUAL SIGNAL
摘要
申请公布号
GB2045585(A)
申请公布日期
1980.10.29
申请号
GB19800008391
申请日期
1980.03.12
申请人
PHILIPS NV
发明人
分类号
H04B3/20;H04B3/23;H04L5/14;(IPC1-7):H04B3/23
主分类号
H04B3/20
代理机构
代理人
主权项
地址
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