Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6139103 | Synchronized chair seat and backrest tilt control mechanism | Philip E. Crossman, Bryan H. Zeeuw, LeRoy Johnson, David A. Young | 2000-10-31 |
| 6010189 | Synchronized chair seat and backrest tilt control mechanism | Philip E. Crossman, Bryan H. Zeeuw, LeRoy Johnson, David A. Young | 2000-01-04 |
| 6000756 | Synchronized chair seat and backrest tilt control mechanism | Philip E. Crossman, Bryan H. Zeeuw, LeRoy Johnson, David A. Young | 1999-12-14 |
| 5427434 | Chair tilt and height adjustment mechanism | — | 1995-06-27 |
| 4948198 | Knee-tilt chair control | Philip E. Crossman, Bryan H. Zeeuw, David A. Young | 1990-08-14 |
| 4535973 | Vehicle tire carrier | William C. Dorr, James A. Yurkinas | 1985-08-20 |