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发明名称
Single-unit frequency changer
摘要
申请公布号
US1800028(A)
申请公布日期
1931.04.07
申请号
US19300440843
申请日期
1930.04.01
申请人
GENERAL ELECTRIC COMPANY
发明人
MERRILL FRANK W.
分类号
H02K47/24
主分类号
H02K47/24
代理机构
代理人
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