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发明名称
COMPUTER,ESPECIALLY FOR DIDACTIC PURPOSES
摘要
申请公布号
PL132267(B1)
申请公布日期
1985.02.28
申请号
PL19790220737
申请日期
1979.12.21
申请人
发明人
分类号
G06F;G06F9/00;(IPC1-7):G06F9/00;G06F15/20
主分类号
G06F
代理机构
代理人
主权项
地址
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