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发明名称
Card punching device
摘要
申请公布号
US1976606(A)
申请公布日期
1934.10.09
申请号
US19320623695
申请日期
1932.07.21
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
DUNN FRANCIS L.
分类号
主分类号
代理机构
代理人
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