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发明名称
Device for programmed instruction
摘要
申请公布号
US3184863(A)
申请公布日期
1965.05.25
申请号
US19620177767
申请日期
1962.03.06
申请人
HACKL ALPHONS J
发明人
HACKL ALPHONS J.
分类号
G09B3/04
主分类号
G09B3/04
代理机构
代理人
主权项
地址
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