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摘要
申请公布号
US2431017(A)
申请公布日期
1947.11.18
申请号
US19440525111
申请日期
1944.03.04
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
AYRES WALDEMAR A.
分类号
G06K19/06
主分类号
G06K19/06
代理机构
代理人
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