Tube à ondes progressives perfectionné,申请号FRD1115741-传众专利搜索

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发明名称	Tube à ondes progressives perfectionné
摘要
申请公布号	FR1115741(A)	申请公布日期	1956.04.27
申请号	FRD1115741	申请日期	1954.11.17
申请人	N. V. PHILIPS' GLOEILAMPENFABRIEKEN	发明人
分类号	H01J23/26;H01J25/38	主分类号	H01J23/26
代理机构		代理人
主权项
地址

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