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发明名称
Electric converter
摘要
申请公布号
US1815498(A)
申请公布日期
1931.07.21
申请号
US19270159454
申请日期
1927.01.06
申请人
NATIONAL CARBON COMPANY, INC.
发明人
CROUSE GEORGE B.
分类号
H04B1/16
主分类号
H04B1/16
代理机构
代理人
主权项
地址
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