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发明名称
Teaching machine card
摘要
申请公布号
US3343277(A)
申请公布日期
1967.09.26
申请号
US19650494160
申请日期
1965.10.08
申请人
MCGRAW-EDISON COMPANY
发明人
KOBLER RICHARD;WHITLOCK BRUCE N.;BABAOFF WILLIAM;PETERPAUL JOSEPH
分类号
G09B5/06
主分类号
G09B5/06
代理机构
代理人
主权项
地址
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