Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841948 | Concave gase tissue expander | Bruce Bauer, Tor E. Allen | 1989-06-27 |
| 4840615 | Self-sealing injection reservoir | John C. Hancock, Charles J. Heyler, III | 1989-06-20 |
| 4798584 | Self-sealing injection reservoir | John C. Hancock, Charles J. Heyler, III | 1989-01-17 |