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发明名称
Local and trunk call discriminating system
摘要
申请公布号
US2585130(A)
申请公布日期
1952.02.12
申请号
US19480001295
申请日期
1948.01.09
申请人
STROMBERG-CARLSON COMPANY
发明人
JONES ROY W.
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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