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发明名称
Record keeping device
摘要
申请公布号
US2106856(A)
申请公布日期
1938.02.01
申请号
US19340710458
申请日期
1934.02.09
申请人
ROREM BERNARD E
发明人
ROREM BERNARD E.
分类号
B42F17/18
主分类号
B42F17/18
代理机构
代理人
主权项
地址
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