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经营范围
发明名称
ACTIVE NOISE FILTER
摘要
申请公布号
GB9017428(D0)
申请公布日期
1990.09.19
申请号
GB19900017428
申请日期
1990.08.08
申请人
CONNOR, F R
发明人
分类号
H03D3/00;H03H11/04;H04B1/10
主分类号
H03D3/00
代理机构
代理人
主权项
地址
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