Tube à faible courant de sonde,申请号FRD836841-传众专利搜索

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发明名称	Tube à faible courant de sonde
摘要
申请公布号	FR836841(A)	申请公布日期	1939.01.26
申请号	FRD836841	申请日期	1938.04.19
申请人	N. V. PHILIPS' GLOEILAMPENFABRIEKEN	发明人
分类号	H01J17/54	主分类号	H01J17/54
代理机构		代理人
主权项
地址

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