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发明名称
Communication system
摘要
申请公布号
US2272367(A)
申请公布日期
1942.02.10
申请号
US19390290275
申请日期
1939.08.15
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
DOTY CHARLES R.
分类号
H04L17/00
主分类号
H04L17/00
代理机构
代理人
主权项
地址
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