Improvements relating to thermionic valves or electron discharge tubes,申请号GB19320006590-传众专利搜索

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发明名称	Improvements relating to thermionic valves or electron discharge tubes
摘要
申请公布号	GB383502(A)	申请公布日期	1932.11.17
申请号	GB19320006590	申请日期	1932.03.04
申请人	N. V. PHILIPS' GLOEILAMPENFABRIEKEN	发明人
分类号	H01J9/04	主分类号	H01J9/04
代理机构		代理人
主权项
地址

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