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发明名称
Copyholder for holding books or sheets
摘要
申请公布号
US2433159(A)
申请公布日期
1947.12.23
申请号
US19440562631
申请日期
1944.11.09
申请人
VILLAFUERTE ROZAS LUIS ALBERTO
发明人
ROZAS LUIS ALBERTO VILLAFUERTE
分类号
B41J29/15
主分类号
B41J29/15
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