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发明名称
Expanding file tray
摘要
申请公布号
US2680443(A)
申请公布日期
1954.06.08
申请号
US19530349350
申请日期
1953.04.17
申请人
NATIONAL BLANK BOOK COMPANY
发明人
SCHADE FRANK STANLEY
分类号
B42F17/02
主分类号
B42F17/02
代理机构
代理人
主权项
地址
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