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| US5112076 | 23 Feb 1990 | 12 May 1992 | | Wheelchair with removable seat |
| US5201084 | 24 Sep 1991 | 13 Apr 1993 | Dutton-Lainson Company | Screw driven lift mechanism for a hospital patient chair transfer system |
| US5201377 | 8 Nov 1991 | 13 Apr 1993 | Love Lift, L.P. | Wheelchair with sidewardly swingable seat |
| US5255934 | 23 Aug 1991 | 26 Oct 1993 | Love Lift, L.P. | Wheelchair seat convertible to toilet seat |
| US5261132 | 24 Sep 1991 | 16 Nov 1993 | Dutton-Lainson Company | Patient chair construction with recliner back tilt control and footrest hinge construction |
| US5380034 | 11 Sep 1992 | 10 Jan 1995 | Love Lift, L.P. | Wheelchair with convertible seat-stretcher |
| US5996150 | 11 Apr 1997 | 7 Dec 1999 | | Cantilevered mobile bed/chair apparatus for safety patient transfer |
