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经营范围
发明名称
Electron discharge tube
摘要
申请公布号
US2194547(A)
申请公布日期
1940.03.26
申请号
US19370160561
申请日期
1937.08.24
申请人
RADIO CORPORATION OF AMERICA
发明人
HAINES DONALD G.
分类号
H01J21/14;H01J31/04
主分类号
H01J21/14
代理机构
代理人
主权项
地址
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