Improvements in or relating to electron discharge devices,申请号GB19400004073-传众专利搜索

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发明名称	Improvements in or relating to electron discharge devices
摘要
申请公布号	GB574512(A)	申请公布日期	1946.01.09
申请号	GB19400004073	申请日期	1940.03.05
申请人	LEONARD FRANCIS BROADWAY;CABOT SEATON BULL	发明人
分类号	H01J25/12	主分类号	H01J25/12
代理机构		代理人
主权项
地址

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