Improvements in and relating to electron discharge devices,申请号GB19300030161-传众专利搜索

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发明名称	Improvements in and relating to electron discharge devices
摘要
申请公布号	GB356964(A)	申请公布日期	1931.09.17
申请号	GB19300030161	申请日期	1930.10.08
申请人	THE BRITISH THOMSON-HOUSTON COMPANY, LIMITED	发明人
分类号	H01J25/52	主分类号	H01J25/52
代理机构		代理人
主权项
地址

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