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发明名称
Numerical comparator
摘要
申请公布号
US2074392(A)
申请公布日期
1937.03.23
申请号
US19330673191
申请日期
1933.05.27
申请人
THE TELEREGISTER CORPORATION
发明人
HERBST JOHN A.
分类号
主分类号
代理机构
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