| Acta SPA | Italy |
|
| Air Liquide | France |
|
| Air Products & Chemicals Inc. | USA |
|
| Ballard Power | Canada |
|
| Ceramic Fuel Cells | Australia |
|
| Ceres Power Holdings Plc | Britain |
|
| CMR Fuel Cells plc | Britain |
|
| Distributed Energy Systems | USA |
|
| FuelCell Energy | USA |
|
| HydroGen Corp. | USA |
|
| Hydrogenics Corp. | Canada |
|
| Hydrogren Engine Center | USA |
|
| ITM Power | Britain |
|
| Magnetek | USA |
|
| Masterflex | Germany |
|
| Medis Technologies | USA |
|
| Millenium Cell | USA |
|
| Pacific Fuel Cell Corp. | USA |
|
| Plug Power | USA |
|
| Polyfuel | USA |
|
| Power Air Corp. | USA |
|
| Praxair | USA |
|
| Proton Power Systems | Germany |
|
| Protonex Technology Corp. | USA |
|
| Voller Energy Group | Britain |
