Improvements in or relating to electron discharge tubes,申请号GB19420001211-传众专利搜索

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发明名称	Improvements in or relating to electron discharge tubes
摘要
申请公布号	GB556461(A)	申请公布日期	1943.10.06
申请号	GB19420001211	申请日期	1942.01.28
申请人	N.V. PHILIPS' GLOEILAMPENFABRIEKEN	发明人
分类号	H01J19/00	主分类号	H01J19/00
代理机构		代理人
主权项
地址

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