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经营范围
发明名称
NUMERAL STUDY PUZZLE
摘要
申请公布号
US3618956(A)
申请公布日期
1971.11.09
申请号
USD3618956
申请日期
1969.08.28
申请人
ROBERT J. BIEDERER
发明人
ROBERT J. BIEDERER
分类号
A63F3/04;A63F9/10;(IPC1-7):A63F9/10;G09B19/02
主分类号
A63F3/04
代理机构
代理人
主权项
地址
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