Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5382077 | Height adjustment mechanism for a chair seat back | William S. Stumpf, Gerard Helmond | 1995-01-17 |
| 5356200 | Unitary brake for a chair tilt mechanism | William S. Stumpf | 1994-10-18 |