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经营范围
发明名称
Educational aid and amusement device
摘要
申请公布号
US2927381(A)
申请公布日期
1960.03.08
申请号
US19560611274
申请日期
1956.09.21
申请人
RENNER EARL J
发明人
RENNER EARL J.
分类号
A63J19/00
主分类号
A63J19/00
代理机构
代理人
主权项
地址
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