Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4826488 | Hypodermic syringe needle guard | Robert A. Nelson | 1989-05-02 |
| 4735617 | Hypodermic syringe needle guard | Robert A. Nelson | 1988-04-05 |
| 4659330 | Hypodermic syringe needle guard | Robert A. Nelson | 1987-04-21 |