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经营范围
发明名称
Direct current carbon arc system
摘要
申请公布号
US2229227(A)
申请公布日期
1941.01.21
申请号
US19390252718
申请日期
1939.01.25
申请人
NATIONAL CARBON COMPANY, INC.
发明人
SIMON RUSSELL W.;LOSIER WILLIAM W.
分类号
H05B31/00;H05B31/06
主分类号
H05B31/00
代理机构
代理人
主权项
地址
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