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发明名称
Communication system
摘要
申请公布号
US2288819(A)
申请公布日期
1942.07.07
申请号
US19400353114
申请日期
1940.08.17
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
NICHOLS HARRY J.
分类号
H04L17/30
主分类号
H04L17/30
代理机构
代理人
主权项
地址
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