Supervisory circuits for telephone subscriber's line,申请号US19590861909-传众专利搜索

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发明名称	Supervisory circuits for telephone subscriber's line
摘要
申请公布号	US3156778(A)	申请公布日期	1964.11.10
申请号	US19590861909	申请日期	1959.12.24
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	CIRONE FRANK P.
分类号	H04M3/22	主分类号	H04M3/22
代理机构		代理人
主权项
地址

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