Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7614704 | Wheelchair seat cushion | James L. Christofferson | 2009-11-10 |
| 7146666 | Seat cushion and method for carrying pressure-distributing medium in a seat cushion | James L. Christofferson | 2006-12-12 |