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经营范围
发明名称
ECHO CANCELLER
摘要
申请公布号
IL52661(A)
申请公布日期
1979.09.30
申请号
IL19770052661
申请日期
1977.08.04
申请人
WESTERN ELECTRIC CO
发明人
分类号
H04B3/23;H04L5/14;(IPC1-7):H04B3/20
主分类号
H04B3/23
代理机构
代理人
主权项
地址
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