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经营范围
发明名称
Improvements in or relating to thermionic valve circuits
摘要
申请公布号
GB382286(A)
申请公布日期
1932.10.21
申请号
GB19310020863
申请日期
1931.07.21
申请人
THE MARCONI INTERNATIONAL MARINE COMMUNICATION COMPANY LIMITED;STENARD ERNEST ANDREW LANDALE
发明人
分类号
H03B5/10
主分类号
H03B5/10
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代理人
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地址
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