Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840615 | Self-sealing injection reservoir | John C. Hancock, William Dubrul | 1989-06-20 |
| 4828560 | Spring ring tissue expander | — | 1989-05-09 |
| 4798584 | Self-sealing injection reservoir | John C. Hancock, William Dubrul | 1989-01-17 |