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发明名称
Geraet zur Wiedergabe eines auf einem Tontraeger aufgezeichneten Lehrprogramms
摘要
申请公布号
DE1812502(A1)
申请公布日期
1970.06.11
申请号
DE19681812502
申请日期
1968.12.04
申请人
WOLFGANG ASSMANN GMBH
发明人
ASSMANN,WOLFGANG
分类号
G09B5/04
主分类号
G09B5/04
代理机构
代理人
主权项
地址
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