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经营范围
发明名称
Improvements in or relating to thermionic amplifiers
摘要
申请公布号
GB404258(A)
申请公布日期
1934.01.11
申请号
GB19320009660
申请日期
1932.04.04
申请人
MARCONI'S WIRELESS TELEGRAPH COMPANY, LIMITED
发明人
分类号
H03F3/28;H03F3/32
主分类号
H03F3/28
代理机构
代理人
主权项
地址
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