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经营范围
发明名称
ECHO CANCELLER
摘要
申请公布号
JPH09107315(A)
申请公布日期
1997.04.22
申请号
JP19950261528
申请日期
1995.10.09
申请人
NEC CORP;NIPPON TELEGR & TELEPH CORP <NTT>
发明人
KICHISE YOSHIKI;MIZUNO TOSHIRO;FUJITANI HIROSHI;MIURA KAZUMA
分类号
H03H21/00;H04B3/23;(IPC1-7):H04B3/23
主分类号
H03H21/00
代理机构
代理人
主权项
地址
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