Improvements in electron discharge devices,申请号GB19280036865-传众专利搜索

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发明名称	Improvements in electron discharge devices
摘要
申请公布号	GB302315(A)	申请公布日期	1930.03.13
申请号	GB19280036865	申请日期	1928.12.13
申请人	THE BRITISH THOMSON-HOUSTON COMPANY, LIMITED	发明人
分类号	H01J9/395	主分类号	H01J9/395
代理机构		代理人
主权项
地址

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