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发明名称
Educational toy
摘要
申请公布号
US3110123(A)
申请公布日期
1963.11.12
申请号
US19610139500
申请日期
1961.09.20
申请人
PEARSON JR WILBUR B
发明人
JR. WILBUR B. PEARSON,
分类号
A63H33/00;G09B23/04 S3/808;H04N7/14;H04N7/15;(IPC1-7):H04N7/14
主分类号
A63H33/00
代理机构
代理人
主权项
地址
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