Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5937655 | Pressure building device for a cryogenic tank | Ryan A. Erickson, Scott D. Isebrand, Audrey Duane Preston | 1999-08-17 |
| 5924291 | High pressure cryogenic fluid delivery system | Thomas K. Drube, Audrey Duane Preston | 1999-07-20 |