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发明名称
Chess board having interchangeable sections
摘要
申请公布号
US3406975(A)
申请公布日期
1968.10.22
申请号
US19640408429
申请日期
1964.11.02
申请人
GEORGE G. BERGER
发明人
BERGER GEORGE G.
分类号
A63F3/00;A63F3/02
主分类号
A63F3/00
代理机构
代理人
主权项
地址
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