Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6474115 | Shaft seal system with leak management | A. Duane Preston | 2002-11-05 |
| 6442980 | Carbon dioxide dry cleaning system | A. Duane Preston, Charles Svoboda | 2002-09-03 |
| 6349947 | High pressure chamber door seal with leak detection system | A. Duane Preston | 2002-02-26 |