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发明名称
Electron discharge device
摘要
申请公布号
US2308523(A)
申请公布日期
1943.01.19
申请号
US19400319414
申请日期
1940.02.17
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
LLEWELLYN FREDERICK B.
分类号
H01J17/04;H01J25/00;H04B1/16
主分类号
H01J17/04
代理机构
代理人
主权项
地址
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