Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6602625 | Fuel cell with dual end plate humidifiers | David Frank | 2003-08-05 |
| 6541141 | Water recovery in the anode side of a proton exchange membrane fuel cell | David Frank | 2003-04-01 |