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发明名称
BATTERY POWERED TELEPHONE RINGING INDICATOR
摘要
申请公布号
GB9302428(D0)
申请公布日期
1993.03.24
申请号
GB19930002428
申请日期
1993.02.08
申请人
FERRIS NEAL;FERRIS MICHAEL
发明人
分类号
H04M19/04
主分类号
H04M19/04
代理机构
代理人
主权项
地址
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