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发明名称
Alternating-current converter
摘要
申请公布号
US1747937(A)
申请公布日期
1930.02.18
申请号
US19210466865
申请日期
1921.05.04
申请人
NATIONAL CARBON COMPANY, INC.
发明人
HOPKINS NEVIL MONROE
分类号
H02M7/36
主分类号
H02M7/36
代理机构
代理人
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地址
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