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发明名称
O VISOR DE SLIDES
摘要
申请公布号
BR6912884(D0)
申请公布日期
1973.01.18
申请号
BR19690212884
申请日期
1969.10.01
申请人
DA SILVA NOGUEIRA J
发明人
DA SILVA NOGUEIRA J
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主分类号
代理机构
代理人
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