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发明名称
Teaching machine
摘要
申请公布号
US3148457(A)
申请公布日期
1964.09.15
申请号
US19620226336
申请日期
1962.09.26
申请人
NAK INCORPORATED
发明人
NICKL FRANKLYN G.;JR. PAUL D. KILBURY,
分类号
G09B3/02
主分类号
G09B3/02
代理机构
代理人
主权项
地址
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