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经营范围
发明名称
Grid electrodes for thermionic valves
摘要
申请公布号
GB565810(A)
申请公布日期
1944.11.29
申请号
GB19420017619
申请日期
1942.12.10
申请人
MARCONI'S WIRELESS TELEGRAPH COMPANY LIMITED
发明人
分类号
H01J19/30
主分类号
H01J19/30
代理机构
代理人
主权项
地址
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