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经营范围
发明名称
Telephone line loop detector
摘要
申请公布号
GB2078058(A)
申请公布日期
1981.12.23
申请号
GB19800019363
申请日期
1980.06.13
申请人
PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES LTD
发明人
分类号
H04M3/22;H04Q1/50;(IPC1-7):H04M3/22
主分类号
H04M3/22
代理机构
代理人
主权项
地址
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