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经营范围
发明名称
Thermionic generator
摘要
申请公布号
US1748713(A)
申请公布日期
1930.02.25
申请号
US19230622415
申请日期
1923.03.02
申请人
RADIO CORPORATION
发明人
GREEN ERNEST
分类号
H01J19/02
主分类号
H01J19/02
代理机构
代理人
主权项
地址
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