Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834092 | Device for driving tools used in orthopedic surgery | Charles E. Alexson | 1989-05-30 |
| 4806730 | Method of forming crisp white indicia in aluminum | Charles E. Alexson | 1989-02-21 |