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发明名称
Educational toy
摘要
申请公布号
US3067524(A)
申请公布日期
1962.12.11
申请号
US19610103550
申请日期
1961.04.17
申请人
CALBEST ENGINEERING & ELECTRONICS CO.
发明人
PARKER HAROLD N.
分类号
A63F9/18;G09B3/06
主分类号
A63F9/18
代理机构
代理人
主权项
地址
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