Systèmes de transmission à hautes fréquences,申请号FRD837921-传众专利搜索

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发明名称	Systèmes de transmission à hautes fréquences
摘要
申请公布号	FR837921(A)	申请公布日期	1939.02.23
申请号	FRD837921	申请日期	1937.10.30
申请人	LE MATERIEL TELEPHONIQUE	发明人
分类号	H04J3/00;H04J3/04	主分类号	H04J3/00
代理机构		代理人
主权项
地址

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