Call tracing method and arrangement,申请号US19650493627-传众专利搜索

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发明名称	Call tracing method and arrangement
摘要
申请公布号	US3412211(A)	申请公布日期	1968.11.19
申请号	US19650493627	申请日期	1965.10.07
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	ABERT CHARLES;SAND WILLIAM C.
分类号	H04Q3/00	主分类号	H04Q3/00
代理机构		代理人
主权项
地址

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