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发明名称
Hilfsmittel fuer das spielerische Lernen von Lesen und Schreiben sowie zur Erweiterung des Wortschatzes
摘要
申请公布号
DE1772823(A1)
申请公布日期
1971.06.09
申请号
DE19681772823
申请日期
1968.07.08
申请人
SCHLOESSER,ROLF
发明人
SCHLOESSER,ROLF
分类号
G09B17/00
主分类号
G09B17/00
代理机构
代理人
主权项
地址
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