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发明名称
AUTOMATIC TELECOMMUNICATION EXCHANGE SYSTEM
摘要
申请公布号
CA460113(A)
申请公布日期
1949.10.04
申请号
CAD460113
申请日期
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
GEORGE CLIFFORD HARTLEY
分类号
主分类号
代理机构
代理人
主权项
地址
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