Party line identification system,申请号US19540451791-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	US2889410(A)	申请公布日期	1959.06.02
申请号	US19540451791	申请日期	1954.08.24
申请人	INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION	发明人	HATTON WILLIAM
分类号	H04M15/36;H04Q5/00	主分类号	H04M15/36
代理机构		代理人
主权项
地址

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