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发明名称
Improvements in thermionic valves
摘要
申请公布号
GB496710(A)
申请公布日期
1938.12.05
申请号
GB19370027238
申请日期
1937.10.07
申请人
THE MI¬O VALVE COMPANY LIMITED;ROBERT LE ROSSIGNOL;STEPHEN MICHAEL DUKE
发明人
分类号
H01J21/08
主分类号
H01J21/08
代理机构
代理人
主权项
地址
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