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经营范围
发明名称
Improvements in or relating to thermionic amplifiers for electromagnetic waves
摘要
申请公布号
GB456301(A)
申请公布日期
1936.11.06
申请号
GB19350035345
申请日期
1935.12.20
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
分类号
H01J25/00;H01J25/34
主分类号
H01J25/00
代理机构
代理人
主权项
地址
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