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发明名称
Filing system
摘要
申请公布号
US2003202(A)
申请公布日期
1935.05.28
申请号
US19330653894
申请日期
1933.01.27
申请人
KEPLAR JAMES M
发明人
KEPLAR JAMES M.
分类号
B42F17/18
主分类号
B42F17/18
代理机构
代理人
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