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经营范围
发明名称
Improvements in or relating to circuit arrangements for amplifying electric oscillations
摘要
申请公布号
GB327433(A)
申请公布日期
1930.04.07
申请号
GB19280032250
申请日期
1928.11.05
申请人
N.V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
H03F1/50
主分类号
H03F1/50
代理机构
代理人
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地址
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