Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9724253 | Foot operated mechanical steering system for a manual wheelchair | Christopher Andrew Zikry, Marcel T. Bernucci, Dat Ho, Phuong V. Dang, Steven A. Lucero | 2017-08-08 |
| 7261309 | Wheelchair drive mechanism | Duane DeJong, Errol C. Armstrong | 2007-08-28 |
| 6893035 | Wheelchair drive mechanism | Duane DeJong, Errol C. Armstrong | 2005-05-17 |
| 6755430 | Wheelchair drive assembly | Errol C. Armstrong, Dayn E. Beals, Duane DeJong | 2004-06-29 |
| 6007082 | Wheelchair driver and braking system | Errol C. Armstrong | 1999-12-28 |
| 5263729 | Wheelchair driver and braking system | Errol C. Armstrong | 1993-11-23 |