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经营范围
发明名称
Incandescent cathode
摘要
申请公布号
US1852739(A)
申请公布日期
1932.04.05
申请号
US19250019351
申请日期
1925.03.30
申请人
RADIO CORPORATION
发明人
DIJKSTERHUIS POPKO REINDER
分类号
H01J1/15
主分类号
H01J1/15
代理机构
代理人
主权项
地址
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