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经营范围
发明名称
Control grid for gas tubes
摘要
申请公布号
US2458213(A)
申请公布日期
1949.01.04
申请号
US19460716202
申请日期
1946.12.14
申请人
RADIO CORPORATION OF AMERICA
发明人
SMITH CHARLES P.
分类号
H01J17/12
主分类号
H01J17/12
代理机构
代理人
主权项
地址
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