DIGITAL TELEPHONY CARD FOR USE IN AN OPERATOR SYSTEM,申请号GB19900003251-传众专利搜索

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发明名称	DIGITAL TELEPHONY CARD FOR USE IN AN OPERATOR SYSTEM
摘要
申请公布号	GB9003251(D0)	申请公布日期	1990.04.11
申请号	GB19900003251	申请日期	1990.02.13
申请人	NORTHERN TELECOM LTD	发明人
分类号	H04B3/20	主分类号	H04B3/20
代理机构		代理人
主权项
地址

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