Improvements in or relating to electron discharge devices,申请号GB19370020671-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	GB499665(A)	申请公布日期	1939.01.26
申请号	GB19370020671	申请日期	1937.07.26
申请人	MARCONI'S WIRELESS TELEGRAPH COMPANY LIMITED	发明人
分类号	H01J43/08	主分类号	H01J43/08
代理机构		代理人
主权项
地址

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