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经营范围
发明名称
Automatic polarity control
摘要
申请公布号
US2760143(A)
申请公布日期
1956.08.21
申请号
US19530360648
申请日期
1953.06.10
申请人
RESEARCH CORPORATION
发明人
STREUBER RUDOLF G.;HOESEN HAROLD E. VAN;WILLISON RALPH E.
分类号
B03C3/68
主分类号
B03C3/68
代理机构
代理人
主权项
地址
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