Improvements relating to the activation of cathodes in electron emitting devices,申请号GB19380016608-传众专利搜索

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发明名称	Improvements relating to the activation of cathodes in electron emitting devices
摘要
申请公布号	GB516571(A)	申请公布日期	1940.01.05
申请号	GB19380016608	申请日期	1938.06.02
申请人	FRANCOIS JOSEPH GERARD VAN DEN BOSCH	发明人
分类号	H01J9/04;H01J40/06	主分类号	H01J9/04
代理机构		代理人
主权项
地址

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