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发明名称
Apparatus for illustrating relation between economic profit and loss
摘要
申请公布号
US2526260(A)
申请公布日期
1950.10.17
申请号
US19480053562
申请日期
1948.10.08
申请人
MOONEY JAMES D
发明人
MOONEY JAMES D.
分类号
G09B19/18
主分类号
G09B19/18
代理机构
代理人
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