Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4315613 | Mechanical height adjustment mechanism for chairs | Herbert E. Collignon | 1982-02-16 |
| 4205413 | Swivel lock and brake mechanism for casters | Herbert E. Collignon | 1980-06-03 |