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发明名称
Line identification system
摘要
申请公布号
US2550181(A)
申请公布日期
1951.04.24
申请号
US19470739478
申请日期
1947.04.04
申请人
AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED
发明人
BAKER GEORGE THOMAS
分类号
H04M15/08
主分类号
H04M15/08
代理机构
代理人
主权项
地址
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