Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5018787 | Chair seat tilt control | Michael H. Estkowski | 1991-05-28 |
| 4892354 | Chair seat tilt control | Michael H. Estkowski, Lennard V. Lastuck | 1990-01-09 |
| 4718726 | Chair seat tilt control | Michael H. Estkowski, Jerome Caruso | 1988-01-12 |