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| US4072308 | 7 avr. 1977 | 7 févr. 1978 | Surgical Appliance Industries, Inc. | Portable weight lifting type forearm exerciser |
| US4411423 | 29 mars 1982 | 25 oct. 1983 | | Exercise device and exercise adapter for forming same |
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| US5312309 | 8 mars 1993 | 17 mai 1994 | | Wrist exerciser |
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| US5620398 | 10 avr. 1996 | 15 avr. 1997 | | Exercise apparatus for wrists and forearms |
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| US6099437 | 3 déc. 1998 | 8 août 2000 | | Exercise apparatus |
| US7029423 | 24 mai 2002 | 18 avr. 2006 | | Cord-winding exercise apparatus |
| USD476706 | 19 juil. 2002 | 1 juil. 2003 | Wristripper, Inc | Exercise device |
| USD505459 | 14 juil. 2003 | 24 mai 2005 | | Forearm exercise device |
| USD538360 | 11 mars 2005 | 13 mars 2007 | Productions Imagine Enterprise, Inc. | Exercise apparatus for forearms |
