Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4796950 | Tilt mechanism, particularly for knee-tilt chair | Walter C. Mrotz, III, Fred C. Liebertz | 1989-01-10 |
| 4720071 | Split nut mechanical height adjusting mechanism for chair | Patrick Nelson | 1988-01-19 |