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经营范围
发明名称
Educational toy
摘要
申请公布号
US2809443(A)
申请公布日期
1957.10.15
申请号
US19540404187
申请日期
1954.01.15
申请人
HOSPODAR PAUL S
发明人
HOSPODAR PAUL S.
分类号
G09B19/02
主分类号
G09B19/02
代理机构
代理人
主权项
地址
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