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发明名称
Playing ball
摘要
申请公布号
US2275374(A)
申请公布日期
1942.03.03
申请号
US19400322283
申请日期
1940.03.05
申请人
DE BEER FREDERICK S
发明人
BEER FREDERICK S. DE
分类号
A63B37/00;A63B37/12
主分类号
A63B37/00
代理机构
代理人
主权项
地址
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