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经营范围
发明名称
ELECTRONIC TONE RINGER
摘要
申请公布号
GB2098429(B)
申请公布日期
1985.02.20
申请号
GB19820013099
申请日期
1982.05.06
申请人
ISEC
发明人
分类号
H04M19/04;(IPC1-7):H04M1/00;H04M3/02
主分类号
H04M19/04
代理机构
代理人
主权项
地址
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