Improvements in or relating to electron discharge devices,申请号GB19470002890-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	GB632948(A)	申请公布日期	1949.12.05
申请号	GB19470002890	申请日期	1947.01.30
申请人	WESTINGHOUSE ELECTRIC INTERNATIONAL COMPANY	发明人
分类号	H01J21/08;H01J25/24	主分类号	H01J21/08
代理机构		代理人
主权项
地址

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