CIRCUITO DI LINEA PER UN SISTEMA TELEFONICO A CHIAVE,申请号IT19730021186-传众专利搜索

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发明名称	CIRCUITO DI LINEA PER UN SISTEMA TELEFONICO A CHIAVE
摘要
申请公布号	IT981119(B)	申请公布日期	1974.10.10
申请号	IT19730021186	申请日期	1973.03.05
申请人	NORTHERN ELECTRIC CO LTD	发明人
分类号	H04M;(IPC1-7):H04M/	主分类号	H04M
代理机构		代理人
主权项
地址

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