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发明名称
Educational game device
摘要
申请公布号
US2178906(A)
申请公布日期
1939.11.07
申请号
US19380220181
申请日期
1938.07.20
申请人
HAUMERSON FREDERICK C
发明人
HAUMERSON FREDERICK C.
分类号
A63F9/18
主分类号
A63F9/18
代理机构
代理人
主权项
地址
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