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发明名称
Electron discharge apparatus
摘要
申请公布号
US2134718(A)
申请公布日期
1938.11.01
申请号
US19360111796
申请日期
1936.11.20
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
KNOOP WILLIAM A.
分类号
G04B37/14;H01J43/04;H01J43/18;H01J43/20
主分类号
G04B37/14
代理机构
代理人
主权项
地址
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