Telephone substation circuit with automatic compensation for length of line,申请号US19470793170-传众专利搜索

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发明名称	Telephone substation circuit with automatic compensation for length of line
摘要
申请公布号	US2620402(A)	申请公布日期	1952.12.02
申请号	US19470793170	申请日期	1947.12.22
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	BOTSFORD NELSON;JR. ALBERT P. BOYSEN,;AIKENS ANDREW J.;JR. WALTER D. GOODALE,;INGLIS ALFRED H.
分类号	H04M1/58;H04M1/76	主分类号	H04M1/58
代理机构		代理人
主权项
地址

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