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发明名称
Electron discharge device
摘要
申请公布号
US1984993(A)
申请公布日期
1934.12.18
申请号
US19310581548
申请日期
1931.12.17
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
RONCI VICTOR L.;LAICO JOSEPH P.
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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