Dispositif assurant la retransmission, dans les deux sens, de signaux d'appel à basse fréquence envoyés sur une ligne téléphonique à deux fils.,申请号CHD272716-传众专利搜索

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发明名称	Dispositif assurant la retransmission, dans les deux sens, de signaux d'appel à basse fréquence envoyés sur une ligne téléphonique à deux fils.
摘要
申请公布号	CH272716(A)	申请公布日期	1950.12.31
申请号	CHD272716	申请日期	1948.03.30
申请人	COMPAGNIE INDUSTRIELLE DES TELEPHONES	发明人	GARDERE,HENRI
分类号	H04Q1/442	主分类号	H04Q1/442
代理机构		代理人
主权项
地址

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