Improvements in or relating to electron discharge devices,申请号GB19490032716-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	GB668355(A)	申请公布日期	1952.03.12
申请号	GB19490032716	申请日期	1949.12.21
申请人	WESTERN ELECTRIC COMPANY	发明人
分类号	H01J21/36	主分类号	H01J21/36
代理机构		代理人
主权项
地址

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