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经营范围
发明名称
Electron discharge tube
摘要
申请公布号
US1946076(A)
申请公布日期
1934.02.06
申请号
US19320611272
申请日期
1932.05.14
申请人
RADIO CORPORATION OF AMERICA
发明人
JONKER JOHAN LODEWYK HENDRIK;GESSEL KAREL MARINUS VAN
分类号
H01J1/22
主分类号
H01J1/22
代理机构
代理人
主权项
地址
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