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经营范围
发明名称
Improvements relating to thermionic amplifying apparatus
摘要
申请公布号
GB387050(A)
申请公布日期
1933.02.02
申请号
GB19310029228
申请日期
1931.10.21
申请人
WILLIAM TROUTBECK SANDERSON;REGINALD BLACKBURN
发明人
分类号
H03F1/36;H04B1/10
主分类号
H03F1/36
代理机构
代理人
主权项
地址
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