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经营范围
发明名称
Educational, recreational, and testing apparatus
摘要
申请公布号
US2947087(A)
申请公布日期
1960.08.02
申请号
US19570646586
申请日期
1957.03.18
申请人
THE UNIVERSITY OF TENNESSEE RESEARCH CORPORATION
发明人
SHARP JOHN B.;ARNOLD ICESY HAYES
分类号
G09B7/06
主分类号
G09B7/06
代理机构
代理人
主权项
地址
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