Systèmes de transmission d'ondes électriques,申请号FRD857689-传众专利搜索

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发明名称	Systèmes de transmission d'ondes électriques
摘要
申请公布号	FR857689(A)	申请公布日期	1940.09.24
申请号	FRD857689	申请日期	1939.07.11
申请人	LE MATERIEL TELEPHONIQUE	发明人
分类号	H04B3/32;H04B3/34	主分类号	H04B3/32
代理机构		代理人
主权项
地址

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