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经营范围
发明名称
ECHO CANCELLER
摘要
申请公布号
JPH05206898(A)
申请公布日期
1993.08.13
申请号
JP19920014302
申请日期
1992.01.29
申请人
NEC CORP
发明人
IKEDA SHIGEJI
分类号
H03H21/00;H04B3/23
主分类号
H03H21/00
代理机构
代理人
主权项
地址
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