CHANNEL EXTENSION SYSTEM FOR PRIVATE BRANCH EXCHANGE,申请号JP19890226199-传众专利搜索

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发明名称	CHANNEL EXTENSION SYSTEM FOR PRIVATE BRANCH EXCHANGE
摘要
申请公布号	JPH0388497(A)	申请公布日期	1991.04.12
申请号	JP19890226199	申请日期	1989.08.30
申请人	RICOH CO LTD	发明人	HASHIMOTO KAORU
分类号	H04Q3/58;H04Q3/42	主分类号	H04Q3/58
代理机构		代理人
主权项
地址

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