Perfectionnements aux dispositifs à décharge électronique,申请号FRD732237-传众专利搜索

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发明名称	Perfectionnements aux dispositifs à décharge électronique
摘要
申请公布号	FR732237(A)	申请公布日期	1932.09.15
申请号	FRD732237	申请日期	1931.04.27
申请人	LE MATERIEL TELEPHONIQUE	发明人
分类号	H01J19/34	主分类号	H01J19/34
代理机构		代理人
主权项
地址

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