Improvements in or relating to electron discharge devices,申请号GB19400013694-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	GB543592(A)	申请公布日期	1942.03.04
申请号	GB19400013694	申请日期	1940.08.31
申请人	MARCONI'S WIRELESS TELEGRAPH COMPANY, LIMITED	发明人
分类号	H01J25/04	主分类号	H01J25/04
代理机构		代理人
主权项
地址

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