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发明名称
Tethered ball
摘要
申请公布号
US2948532(A)
申请公布日期
1960.08.09
申请号
US19570693991
申请日期
1957.11.01
申请人
JEPSEN TERMAN J C
发明人
JEPSEN TERMAN J. C.
分类号
A63B43/00
主分类号
A63B43/00
代理机构
代理人
主权项
地址
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