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发明名称
Push ball
摘要
申请公布号
US1779187(A)
申请公布日期
1930.10.21
申请号
US19290351649
申请日期
1929.04.01
申请人
PEARSON HENRY C
发明人
PEARSON HENRY C.
分类号
A63B43/02
主分类号
A63B43/02
代理机构
代理人
主权项
地址
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