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发明名称
Educational device for teaching electrical circuit theory, fundamentals, electronics, and the like
摘要
申请公布号
US3175304(A)
申请公布日期
1965.03.30
申请号
US19610109628
申请日期
1961.05.12
申请人
OCH EDWARD J;GEIGLE JOHN F
发明人
OCH EDWARD J.;GEIGLE JOHN F.
分类号
G09B23/18
主分类号
G09B23/18
代理机构
代理人
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地址
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