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发明名称
ORDNER FUER BLATTSAMMLUNGEN MIT SPARHEFTELN.
摘要
申请公布号
DE1742836(U)
申请公布日期
1957.04.11
申请号
DE195700H4200U
申请日期
1957.02.26
申请人
HELMUT HOFMANN
发明人
HELMUT HOFMANN
分类号
主分类号
代理机构
代理人
主权项
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