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发明名称
LEHRSYSTEM
摘要
申请公布号
DE60012341(D1)
申请公布日期
2004.08.26
申请号
DE20006012341
申请日期
2000.09.13
申请人
CATLIN, DAVID
发明人
CATLIN, DAVID
分类号
G09B5/14;G09B7/02;(IPC1-7):G09B5/14
主分类号
G09B5/14
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代理人
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