Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6780186 | Anterior cervical plate having polyaxial locking screws and sliding coupling elements | Thomas J. Errico, James D. Ralph | 2004-08-24 |
| 6758861 | Intervertebral spacer device having a wave washer force restoring element | James D. Ralph, Stephen Tatar | 2004-07-06 |
| 6723127 | Artificial intervertebral disc having a wave washer force restoring element | James D. Ralph, Stephen Tatar | 2004-04-20 |
| 6673113 | Intervertebral spacer device having arch shaped spring elements | James D. Ralph, Stephen Tatar | 2004-01-06 |