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经营范围
发明名称
Teaching and testing machine
摘要
申请公布号
US3082545(A)
申请公布日期
1963.03.26
申请号
US19610125397
申请日期
1961.07.20
申请人
KIKER JR CHARLES W
发明人
JR. CHARLES W. KIKER,
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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