TENNIS BALL HAVING A CORE WITH INTERNAL MATERIAL SHIFT LINES |
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| 申请号 | US15458820 | 申请日 | 2017-03-14 | 公开(公告)号 | US20180264327A1 | 公开(公告)日 | 2018-09-20 |
| 申请人 | Wilson Sporting Goods Co.; | 发明人 | Frank M. Simonutti; Robert T. Thurman; William E. Dillon; David A. Vogel; | ||||
| 摘要 | A tennis ball may include a spherical hollow core having an inner surface including material shift lines and a textile outer layer over and about the core. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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