Tube électrique luminescent à électrodes incandescentes émettant des électrons,申请号FRD694638-传众专利搜索

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发明名称	Tube électrique luminescent à électrodes incandescentes émettant des électrons
摘要
申请公布号	FR694638(A)	申请公布日期	1930.12.05
申请号	FRD694638	申请日期	1930.04.28
申请人	"OSA" PARTICIPATIONS INDUSTRIELLES (SOC. AN.)	发明人
分类号	H01J61/35	主分类号	H01J61/35
代理机构		代理人
主权项
地址

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