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发明名称
Communication system
摘要
申请公布号
US2161586(A)
申请公布日期
1939.06.06
申请号
US19350054134
申请日期
1935.12.12
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
NICHOLS HARRY J.;THOLSTRUP HENRY L.
分类号
H04L25/49
主分类号
H04L25/49
代理机构
代理人
主权项
地址
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