Improvements relating to thermionic valves and to cathode structures therefor,申请号GB19390021989-传众专利搜索

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发明名称	Improvements relating to thermionic valves and to cathode structures therefor
摘要
申请公布号	GB530300(A)	申请公布日期	1940.12.09
申请号	GB19390021989	申请日期	1939.07.28
申请人	STANDARD TELEPHONES AND CABLES LIMITED;ROBERT RICHARD NEWCOMBE MURPHY	发明人
分类号	H01J1/26	主分类号	H01J1/26
代理机构		代理人
主权项
地址

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