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经营范围
发明名称
Ground noise elimination
摘要
申请公布号
US1971181(A)
申请公布日期
1934.08.21
申请号
US19300443875
申请日期
1930.04.12
申请人
GENERAL ELECTRIC COMPANY
发明人
GREENTREE CHARLES D.
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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