Issued Patents All Time
Showing 51–54 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7096955 | Long duration fuel cell system | Joe Walter | 2006-08-29 |
| 7069998 | Fuel cell for downhole and subsea power systems | Kenneth L. Havlinek, Vance Nixon | 2006-07-04 |
| 6686079 | Fuel cell for downhole power systems | Donald E. Hensley, Kenneth L. Havlinek | 2004-02-03 |
| 6575248 | Fuel cell for downhole and subsea power systems | Kenneth L. Havlinek, Vance Nixon | 2003-06-10 |