Perfectionnements aux systèmes de transmission télégraphique par fréquence vocale à double courant,申请号FRD895986-传众专利搜索

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发明名称	Perfectionnements aux systèmes de transmission télégraphique par fréquence vocale à double courant
摘要
申请公布号	FR895986(A)	申请公布日期	1945.02.08
申请号	FRD895986	申请日期	1943.03.12
申请人	COMPAGNIE GENERALE D'ELECTRICITE	发明人
分类号	H04L27/20;H04L27/227	主分类号	H04L27/20
代理机构		代理人
主权项
地址

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