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发明名称
Improvements in thermionic amplifiers
摘要
申请公布号
GB412532(A)
申请公布日期
1934.06.28
申请号
GB19340011443
申请日期
1934.04.16
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
H03D1/16;H04B1/16
主分类号
H03D1/16
代理机构
代理人
主权项
地址
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