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发明名称
Toll telephone system
摘要
申请公布号
US2943154(A)
申请公布日期
1960.06.28
申请号
US19560559141
申请日期
1956.01.16
申请人
AUTOMATIC ELECTRIC LABORATORIES, INC.
发明人
LOMAX CLARENCE E.
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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