Balancing network for subscribers' telephone sets,申请号US19480033137-传众专利搜索

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发明名称	Balancing network for subscribers' telephone sets
摘要
申请公布号	US2568150(A)	申请公布日期	1951.09.18
申请号	US19480033137	申请日期	1948.06.15
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	GRAHAM FRANK H.
分类号	H04M1/58	主分类号	H04M1/58
代理机构		代理人
主权项
地址

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