| 发明名称 |
Underground trampoline ring design |
| 摘要 |
An in-ground trampoline system configured to provide a ground level jumping surface which consists of a trampoline, a pit, and a segmented retaining wall configured to support the walls of the pit.
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| 申请公布号 |
US7691032(B2) |
申请公布日期 |
2010.04.06 |
| 申请号 |
US20070857595 |
申请日期 |
2007.09.19 |
| 申请人 |
BURNHAM TRACY;EVANS K DONALD;MULLER MARK;LEOPOLD JERRY;COOK CORY E |
发明人 |
BURNHAM TRACY;EVANS K. DONALD;MULLER MARK;LEOPOLD JERRY;COOK CORY E. |
| 分类号 |
A63B5/11 |
主分类号 |
A63B5/11 |
| 代理机构 |
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代理人 |
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| 主权项 |
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