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经营范围
发明名称
NOISE REDUCTION CIRCUITS
摘要
申请公布号
GB2083987(A)
申请公布日期
1982.03.31
申请号
GB19810027033
申请日期
1981.09.07
申请人
SONY CORP
发明人
分类号
H04B1/62;G11B20/04;H03G9/02;(IPC1-7):H04B1/64
主分类号
H04B1/62
代理机构
代理人
主权项
地址
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