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发明名称
MAGNETIC PLAYING PIECES
摘要
申请公布号
CA519848(A)
申请公布日期
1955.12.27
申请号
CAD519848
申请日期
申请人
LUDVIK HLAVAC
发明人
LUDVIK HLAVAC
分类号
主分类号
代理机构
代理人
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