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经营范围
发明名称
Improvements in or relating to high frequency amplifiers
摘要
申请公布号
GB345822(A)
申请公布日期
1931.04.02
申请号
GB19300010242
申请日期
1930.03.31
申请人
MARCONI'S WIRELESS TELEGRAPH COMPANY, LIMITED
发明人
分类号
H03H7/01
主分类号
H03H7/01
代理机构
代理人
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