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| US5158519 | 13. März 1991 | 27. Okt. 1992 | | Body exerciser using multi-surfaced, distributed frictional brake means |
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| US5989162 | 8. Mai 1998 | 23. Nov. 1999 | | Portable exercise device |
| US6113522 | 28. Nov. 1997 | 5. Sept. 2000 | Robert N. Montgomery | Exercise apparatus |
| US7727129 | 6. Febr. 2006 | 1. Juni 2010 | | Dual lift apparatus |
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| USD344993 | 18. Aug. 1992 | 8. März 1994 | | Torso exercise machine |
