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发明名称
Electron tube with secondary emissive grid
摘要
申请公布号
US2430218(A)
申请公布日期
1947.11.04
申请号
US19440527474
申请日期
1944.03.21
申请人
EITEL-MCCULLOUGH, INC.
发明人
EITEL WILLIAM W.;MCCULLOUGH JACK A.
分类号
H01J19/42
主分类号
H01J19/42
代理机构
代理人
主权项
地址
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