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经营范围
发明名称
Bladder structure of a football
摘要
A football bladder includes an oval body and multiple ribs formed on an outer periphery of the oval body. After a skin is attached to the outer periphery of the oval body, protruding strips are formed on an outer periphery of the skin.
申请公布号
US2007178997(A1)
申请公布日期
2007.08.02
申请号
US20060344271
申请日期
2006.01.31
申请人
CHANG YEN-LI
发明人
CHANG YEN-LI
分类号
A63B41/00;A63B39/00
主分类号
A63B41/00
代理机构
代理人
主权项
地址
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