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发明名称
Sheet-holding attachment for card-index trays
摘要
申请公布号
US1799367(A)
申请公布日期
1931.04.07
申请号
US19300488491
申请日期
1930.10.13
申请人
REMINGTON RAND INC.
发明人
HEISINGER WILHELM
分类号
B42F17/20
主分类号
B42F17/20
代理机构
代理人
主权项
地址
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