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发明名称
Improvements in or relating to thermionic valve amplifying systems
摘要
申请公布号
GB344076(A)
申请公布日期
1931.03.05
申请号
GB19290037313
申请日期
1929.12.05
申请人
STANDARD TELEPHONES AND CABLES, LIMITED
发明人
分类号
H03F1/08;H04B1/10
主分类号
H03F1/08
代理机构
代理人
主权项
地址
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