FOUR-WIRE SIGNALLING CIRCUIT,申请号CAD426779-传众专利搜索

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发明名称	FOUR-WIRE SIGNALLING CIRCUIT
摘要
申请公布号	CA426779(A)	申请公布日期	1945.04.10
申请号	CAD426779	申请日期
申请人	WESTERN ELECTRIC COMPANY, INCORPORATED;BELL TELEPHONE LABORATORIES	发明人	NELSON BOTSFORD
分类号		主分类号
代理机构		代理人
主权项
地址

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