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发明名称
INTERAKTIVES MIT LAUTENREAGIERENDES LERNSYSTEM, ZUGAENGLICH MITTELS EINES TONERZEUGENDEN TELEPHONS.
摘要
申请公布号
DE3581738(D1)
申请公布日期
1991.03.14
申请号
DE19853581738
申请日期
1985.09.02
申请人
ECKMANN, STUART F., MOUNTAIN VIEW, CALIF., US
发明人
ECKMANN, STUART F., MOUNTAIN VIEW, CALIF., US
分类号
H04M3/493;H04M11/00;(IPC1-7):G09B7/06;H04M3/50
主分类号
H04M3/493
代理机构
代理人
主权项
地址
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