Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867680 | Pre-loaded dental impression package and method of making | Robert V. Hare, Paul D. Hammesfahr | 1989-09-19 |
| 4846165 | Wound dressing membrane | Steven R. Jefferies | 1989-07-11 |
| 4813875 | Chain extended urethane diacrylate and dental impression formation | — | 1989-03-21 |