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发明名称
Oxide coated cathode
摘要
申请公布号
US1999806(A)
申请公布日期
1935.04.30
申请号
US19330658524
申请日期
1933.02.25
申请人
HEINTZ & KAUFMAN, LTD.
发明人
EITEL WILLIAM W.;MCCULLOUGH JACK
分类号
H01J9/04
主分类号
H01J9/04
代理机构
代理人
主权项
地址
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