Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840390 | Symmetrically modular wheelchair | Allen J. Boris, Wieslaw Kosc | 1989-06-20 |
| 4813693 | Adjustable child's wheelchair | Herbert J. Hoekstra, Allen J. Boris, Douglas M. Nickles | 1989-03-21 |
| 4805925 | Adjustable rear wheel mounting assembly for wheelchairs | Gilbert E. Haury, Nathalal C. Patel, Thomas R. Wiatrak, Neal J. Curran | 1989-02-21 |