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| Number | Title | Issue Date |
| 6837828 | Elasticity-controllable trampoline using plate spring Disclosed is an elasticity-controllable trampoline using a plate spring that can be manufactured in small size and in low height compared with existing trampolines using coil springs, thereby proving stability to a user. Also, it has a mechanical structure, thereby ... | 01/04/2005 |
| 6071212 | Gymnastic equipment for vaulting exercises A gymnastic apparatus for performing vaults possesses a lower portion, an upper part arranged on same in a vertically adjustable fashion and constituted by a board arranged in a resilient manner on the lower portion. A gymnast running toward a front side ... | 06/06/2000 |
| 4341380 | Body cell therapeutic device A therapeutic device comprising a base, usually resting upon a floor, and a platform, usually located above the base that is maintained rigidly parallel to the base in a horizontal plane throughout up and down cycles. The platform is attached either with ... | 07/27/1982 |
