Party line identification system,申请号US19440552992-传众专利搜索

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发明名称	Party line identification system
摘要
申请公布号	US2401352(A)	申请公布日期	1946.06.04
申请号	US19440552992	申请日期	1944.09.07
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	HERSEY RALPH E.
分类号	H04M15/36	主分类号	H04M15/36
代理机构		代理人
主权项
地址

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