Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8197009 | Wheelchair seatback with two-point mounting hardware | Thomas J. Whelan, James L. Christofferson, Vincent J. Frerich | 2012-06-12 |
| 7857394 | Wheelchair seat back with two-point mounting hardware | Thomas J. Whelan, James L. Christofferson, Vincent J. Frerich, James M. Koerlin | 2010-12-28 |