Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5689999 | Adjustable rotary locking and unlocking apparatus | Robert A. Wiley, Michael J. Larkin | 1997-11-25 |
| 5449478 | Contoured seating construction and method | John W. Hoornstra | 1995-09-12 |
| 5209509 | Wheelchair footrest assembly | John W. Hoornstra | 1993-05-11 |
| 4893827 | Chair construction for incapacitated persons | John W. Hoornstra | 1990-01-16 |