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发明名称
Apparatus for the duplicating of index cards and the like for cross filing purposes
摘要
申请公布号
US2496272(A)
申请公布日期
1950.02.07
申请号
US19450637477
申请日期
1945.12.27
申请人
CURRENT IRA B
发明人
CURRENT IRA B.
分类号
G03B27/46
主分类号
G03B27/46
代理机构
代理人
主权项
地址
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