|
| US4041927 | 24 Jul 1975 | 16 Aug 1977 | | Archery bow with pivoted bow limbs having rotational synchronizer and adjustable draw force mechanisms |
| US4227689 | 24 Jul 1978 | 14 Oct 1980 | Kintron, Incorporated | Exercising device including linkage for control of muscular exertion required through exercising stroke |
| US4397462 | 26 Jun 1981 | 9 Aug 1983 | | Pneumatic exercising device |
| US4465274 | 27 Sep 1982 | 14 Aug 1984 | | Hydraulic exercise device |
| US4496147 | 12 Mar 1982 | 29 Jan 1985 | Arthur D. Little, Inc. | Exercise stair device |
| US4576377 | 15 Aug 1985 | 18 Mar 1986 | | Athletic exerciser assembly |
| US4645205 | 8 Jul 1985 | 24 Feb 1987 | | Athletic exerciser for paraplegics and quadriplegics |
| US4667955 | 30 Apr 1985 | 26 May 1987 | | Hydraulic universal gym |
| US4848739 | 2 Feb 1988 | 18 Jul 1989 | | Hydraulic exercise machine |
| US4979736 | 22 Mar 1989 | 25 Dec 1990 | Titan Fitness Products Pty. Ltd. | Hydraulic gymnasium equipment |
| US5064193 | 13 Nov 1989 | 12 Nov 1991 | Walker Fitness Systems, Inc. | Automatic force generating and control system |
| US5072932 | 26 Feb 1991 | 17 Dec 1991 | | Exercise apparatus |
| US5209714 | 21 Oct 1991 | 11 May 1993 | Walker Fitness Systems, Inc. | Automatic force generating and control system |
| US5330406 | 10 Jun 1993 | 19 Jul 1994 | | Hydraulic exercise apparatus |
| US5385524 | 12 May 1993 | 31 Jan 1995 | | Exercise device |
| US5499959 | 12 Jul 1994 | 19 Mar 1996 | StairMaster Sports/Medical Products, Inc. | Upper body exercise apparatus |
| US5540639 | 21 Sep 1993 | 30 Jul 1996 | StairMaster Sports/Medical Products, Inc. | Device to prevent arcuate motion of a user assist platform for an upper body exercise apparatus |