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发明名称
Magnetic quiz game
摘要
申请公布号
US3107436(A)
申请公布日期
1963.10.22
申请号
US19620196745
申请日期
1962.05.22
申请人
EDWARDS BENJAMIN F
发明人
EDWARDS BENJAMIN F.
分类号
G09B1/08
主分类号
G09B1/08
代理机构
代理人
主权项
地址
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