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发明名称
Valved tennis balls
摘要
申请公布号
GB2089664(A)
申请公布日期
1982.06.30
申请号
GB19810036494
申请日期
1981.12.03
申请人
HOFFMAN ALLAN CURTISS
发明人
分类号
A63B39/04;F16K15/14;F16K15/20;(IPC1-7):A63B41/08;A63B41/12;F16K15/16
主分类号
A63B39/04
代理机构
代理人
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地址
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