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发明名称
ECHO CANCELLER
摘要
申请公布号
JPH0454718(A)
申请公布日期
1992.02.21
申请号
JP19900165909
申请日期
1990.06.25
申请人
NEC CORP
发明人
TAKAHASHI YUTAKA
分类号
H03H21/00;H03H17/00;H03H17/02;H04B3/23
主分类号
H03H21/00
代理机构
代理人
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地址
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