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经营范围
发明名称
Foul ball indicator
摘要
申请公布号
US2461836(A)
申请公布日期
1949.02.15
申请号
US19460704221
申请日期
1946.10.18
申请人
NELSON ALLEN K
发明人
NELSON ALLEN K.
分类号
A63B69/00
主分类号
A63B69/00
代理机构
代理人
主权项
地址
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