Improvements in or relating to electric discharge tubes,申请号GB19300022820-传众专利搜索

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发明名称	Improvements in or relating to electric discharge tubes
摘要
申请公布号	GB356407(A)	申请公布日期	1931.09.10
申请号	GB19300022820	申请日期	1930.07.29
申请人	N. V. PHILIPS' GLOEILAMPENFABRIEKEN	发明人
分类号	H01J61/24	主分类号	H01J61/24
代理机构		代理人
主权项
地址

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