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经营范围
发明名称
Commutator
摘要
申请公布号
US2573316(A)
申请公布日期
1951.10.30
申请号
US19410394884
申请日期
1941.05.23
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
DICKINSON ARTHUR H.
分类号
G06F9/32;H04J3/04;H04Q3/52
主分类号
G06F9/32
代理机构
代理人
主权项
地址
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