|
| US3983960 | 20 Jan 1975 | 5 Oct 1976 | Robert Staines | Scissors lift |
| US3991857 | 24 Mar 1975 | 16 Nov 1976 | Charles J. Wolk | Elevatable platform for load transfer |
| US4549720 | 19 Jan 1984 | 29 Oct 1985 | | Device for raising and lowering objects |
| US4558847 | 10 Feb 1983 | 17 Dec 1985 | Coates Management Pty. Ltd. | Patient lifting table |
| US4580764 | 1 Mar 1984 | 8 Apr 1986 | | Pedestrian-controlled lift truck for moving helicopters |
| US4890692 | 6 Dec 1988 | 2 Jan 1990 | JLG Industries, Inc. | Platform elevating apparatus |
| US5192053 | 7 May 1991 | 9 Mar 1993 | | Device for initiating a lifting movement in a lifting device |
