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发明名称
TELEPHONE SYSTEMS
摘要
申请公布号
GB8905852(D0)
申请公布日期
1989.04.26
申请号
GB19890005852
申请日期
1989.03.14
申请人
FERRANTI CREDITPHONE LIMITED
发明人
分类号
H04M1/733;H04W84/16
主分类号
H04M1/733
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代理人
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