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经营范围
发明名称
Improvements relating to apparatus including thermionic valves
摘要
申请公布号
GB588517(A)
申请公布日期
1947.05.27
申请号
GB19450004738
申请日期
1945.02.26
申请人
THE BRITISH THOMSON-HOUSTON COMPANY LIMITED;WILLIAM SIMM MELVILLE
发明人
分类号
H05K7/20
主分类号
H05K7/20
代理机构
代理人
主权项
地址
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