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发明名称
Card sorting device
摘要
申请公布号
US2683458(A)
申请公布日期
1954.07.13
申请号
US19510260294
申请日期
1951.12.06
申请人
UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF AGRICULTURE
发明人
DAVIS MARTHA E.;JACOBSEN JACOB C.
分类号
G06K21/04
主分类号
G06K21/04
代理机构
代理人
主权项
地址
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