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发明名称
Valuation exhibitor
摘要
申请公布号
US2239819(A)
申请公布日期
1941.04.29
申请号
US19400339403
申请日期
1940.06.07
申请人
HOLME MARY E
发明人
HOLME MARY E.
分类号
G09B5/02
主分类号
G09B5/02
代理机构
代理人
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