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发明名称
ECHO CANCELER
摘要
申请公布号
JPH0470220(A)
申请公布日期
1992.03.05
申请号
JP19900182973
申请日期
1990.07.11
申请人
NEC CORP
发明人
SANO HIDEO
分类号
H03H21/00;H03H17/00;H03H17/02;H04B3/23;H04M1/60
主分类号
H03H21/00
代理机构
代理人
主权项
地址
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