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经营范围
发明名称
Thermionic cathode structure
摘要
申请公布号
US2825832(A)
申请公布日期
1958.03.04
申请号
US19530396027
申请日期
1953.12.03
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
CUTLER CASSIUS C.
分类号
H01J1/20
主分类号
H01J1/20
代理机构
代理人
主权项
地址
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