Line selection system,申请号US19520286265-传众专利搜索

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发明名称	Line selection system
摘要
申请公布号	US2721903(A)	申请公布日期	1955.10.25
申请号	US19520286265	申请日期	1952.05.06
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	AVERY ROBERT C.
分类号	H04M3/30	主分类号	H04M3/30
代理机构		代理人
主权项
地址

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