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发明名称
Automatic telecommunication exchange system
摘要
申请公布号
US2678354(A)
申请公布日期
1954.05.11
申请号
US19510205915
申请日期
1951.01.13
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
HERTOG MARTINUS DEN
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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