Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872452 | Bone rasp | — | 1989-10-10 |
| 4834092 | Device for driving tools used in orthopedic surgery | Heinz H. Guenther | 1989-05-30 |
| 4806730 | Method of forming crisp white indicia in aluminum | Heinz H. Guenther | 1989-02-21 |