Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859336 | Filtering device for dispensing and filtering from samples | Virginia S. Kiger | 1989-08-22 |
| 4800020 | Piston filtering device | Virginia S. Kiger, Ronald R. Boudreau | 1989-01-24 |