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发明名称
Spinning top
摘要
申请公布号
US2446447(A)
申请公布日期
1948.08.03
申请号
US19460713214
申请日期
1946.11.30
申请人
FRED WARTELL
发明人
WARTELL FRED
分类号
A63H1/00
主分类号
A63H1/00
代理机构
代理人
主权项
地址
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