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发明名称
Electron tube and method of making same
摘要
申请公布号
US2417730(A)
申请公布日期
1947.03.18
申请号
US19440553133
申请日期
1944.09.06
申请人
EITEL-MCCULLOUGH, INC.
发明人
BECKER GEORGE A.
分类号
H01J19/30
主分类号
H01J19/30
代理机构
代理人
主权项
地址
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