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| Number | Title | Issue Date |
| 6209159 | Pressure reducing cushion with selective pressure point relief A pressure reducing cushion with selective pressure point relief features at least two air bladders, and a foam outer layer covering the air bladders. Each air bladder consists of an impervious to air sheet material which surrounds an open celled compress... | 04/03/2001 |
| 5893184 | Pressure reducing backrest cushion with selective pressure point relief A pressure reducing backrest cushion with selective pressure point relief features at least two air bladders, and a foam outer layer covering the air bladders. Each air bladder consists of an impervious to air sheet material which surrounds an open celled... | 04/13/1999 |
