Method for monitoring telephone status changes,申请号US19880246478-传众专利搜索

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发明名称	Method for monitoring telephone status changes
摘要
申请公布号	US4847893(A)	申请公布日期	1989.07.11
申请号	US19880246478	申请日期	1988.09.19
申请人	IBM CORPORATION	发明人	DANG, MIEU-HONG;JAMES, NIGEL V.;JREIJ, ELIE A.;TABORGA, JORGE R.
分类号	H04M11/00;H04M11/06	主分类号	H04M11/00
代理机构		代理人
主权项
地址

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