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经营范围
发明名称
TEACHING PUZZLE
摘要
申请公布号
US3570144(A)
申请公布日期
1971.03.16
申请号
USD3570144
申请日期
1969.06.11
申请人
DENYSE C. MCNUTT
发明人
DENYSE C. MCNUTT
分类号
A63F9/10;G09B23/38;(IPC1-7):G09B23/28
主分类号
A63F9/10
代理机构
代理人
主权项
地址
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