,申请号DE19772741768-传众专利搜索

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发明名称
摘要
申请公布号	DE2741768(C2)	申请公布日期	1989.02.16
申请号	DE19772741768	申请日期	1977.09.16
申请人	BRITISH TELECOMMUNICATIONS P.L.C., LONDON, GB	发明人	CARD, STUART EDWARD, LUTON, BEDFORSHIRE, GB;GRIFFITHS, DAVID FRANK, STEVENAGE, HERTFORDSHIRE, GB
分类号	H04Q3/58;H04M3/60	主分类号	H04Q3/58
代理机构		代理人
主权项
地址

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