EXTENSION CALL SYSTEM FOR EXCHANGE SYSTEM,申请号JP19900040999-传众专利搜索

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发明名称	EXTENSION CALL SYSTEM FOR EXCHANGE SYSTEM
摘要
申请公布号	JPH03245650(A)	申请公布日期	1991.11.01
申请号	JP19900040999	申请日期	1990.02.23
申请人	NITSUKO CORP	发明人	IMAGAWA HITOSHI
分类号	H04M3/42;H04Q3/58	主分类号	H04M3/42
代理机构		代理人
主权项
地址

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