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经营范围
发明名称
System of neutralization
摘要
申请公布号
US1813036(A)
申请公布日期
1931.07.07
申请号
US19270174475
申请日期
1927.03.11
申请人
VICTOR TALKING MACHINE COMPANY
发明人
ELLIOTT HAROLD F.
分类号
H03F1/16
主分类号
H03F1/16
代理机构
代理人
主权项
地址
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