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发明名称
Communication system
摘要
申请公布号
US2142351(A)
申请公布日期
1939.01.03
申请号
US19350038698
申请日期
1935.08.31
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
FITCH CLYDE J.
分类号
主分类号
代理机构
代理人
主权项
地址
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