AlliedSignal Aerospace Co., California, USA (PEM and SOFC)

American Fuel Cell Corp., Massachusetts, USA (PEM)

Anuvu Incorporated, California, USA (PEM)

Argonne National Laboratory, Illinois, USA (PEM, MCFC and SOFC)

Avista Laboratories, Washington, USA (PEM)

Azienda Energetica Municipale (AEM spa Milano), Milano, ITALY (PAFC)

Ball Aerospace & Technologies Corp., Colorado, USA

Ballard Generation Systems, Inc., New Jersey, USA (PEM)

Ballard Power Systems, Inc., British Columbia, CANADA (PEM)

BCS Technology, Inc., Texas, USA (PEM)

Case Western Reserve University, Ernest B. Yeager Center, Ohio, USA (PEM)

Celsius, Malmo, SWEDEN (PEM)

Ceramatec, Utah, USA (SOFC)

Ceramic Fuel Cells Ltd., Victoria, AUSTRALIA (SOFC)

Consejo Superior de Investigaciones Cientificas, Madrid, SPAIN (PEM, MCFC, SOFC)

Coval H2 Partners, California, USA (PEM)

CSIRO Energy Technology, New South Wales, AUSTRALIA

DAIS Corporation, Florida, USA (PEM)

DCH Technology, Inc., California, USA (PEM)

DE NORA s.p.a., ITALY (PEM)

dmc-2 (Degussa Metals Catalysts Cerdec), Michigan, USA (PEM)

Desert Research Institute, Nevada, USA (PEM, PAFC)

Draeger Safety, Colorado, USA (PEM)

EBARA Ballard Corporation, Tokyo, JAPAN (PEM)

Electric Auto Corporation, Florida, USA (AFC)

Electric Power Research Institute, California, USA (PAFC and MCFC)

Electro-Chem-Technic, Oxford, UNITED KINGDOM (PEM, PAFC)

ElectroChem, Inc., Massachusetts, USA (PEM)

Element 1 Power Systems Inc., California, USA

Elf Atochem North America, Pennsylvania, USA (PEM)

Energia Ltd., Virginia, USA

Energy Partners, L.C., Florida, USA (PEM)

Energy Related Devices, New Mexico, USA (PEM)

Energy Research Corporation (as of 9/2, FuelCell Energy), Connecticut, USA (DFC and MCFC)

E-TEK, Inc., Massachusetts, USA

ETH Ceramics, Zurich, SWITZERLAND (SOFC)

Federal Energy Technology Center, West Virginia, USA (MCFC and SOFC)

FEV Motorentechnik GmbH, GERMANY (PEM, SOFC)

Florida Solar Energy Center, Florida, USA (PEM)

Forschungszentrum Julich, GERMANY (DMFC, SOFC & PEM)

Fuel Cell Group, DENMARK (PAFC, MCFC and SOFC)

Fuel Cell Technologies, Ltd., Ontario, CANADA

Gas Research Institute, Illinois, USA (SOFC)

Gaskatel GmbH, Kassel, GERMANY (AFC & PEM)

Gaz De France, La Plaine, FRANCE (PAFC, PEMFC, SOFC)

GE Energy and Environmental Research Corp., California, USA (PEM, MCFC, SOFC)

Global Thermoelectric Inc., CANADA (SOFC)

H Power, New Jersey, USA (PEM)

Hitachi Works, Ibaraki, JAPAN (MCFC)

H-Tec - Wasserstoff-Energie-Systeme GmbH, Luebeck, GERMANY (PEM)

Hydro Quebec Research Institute, Quebec, CANADA

Hydrocell U.K., UNITED KINGDOM (AFC, PEM)

Hydrogenics Corporation, Toronto, CANADA

ICP-CSIC, Madrid, SPAIN

ICTP-CSIC, Madrid, SPAIN (PEM)

ICV-CSIC, Madrid, SPAIN (SOFC)

IdaTech, Oregon, USA (PEM)

InnovaTek, Inc., Washington, USA

Institute of Gas Technology, Illinois, USA (PAFC, PEM, MCFC and SOFC)

International Fuel Cells, Connecticut, USA (PAFC and PEM)

Ion Power, Inc., Delaware, USA (PEM)

Japan Automobile Research Institute, Inc., JAPAN (PEM)

JLG Industries, Pennsylvania, USA (PEM)

Lawrence Berkeley Laboratory, California, USA (PEM)

Lawrence Livermore National Laboratory, California, USA

Los Alamos National Laboratory, New Mexico, USA (PEM)

Lund Institute of Technology, Lund, SWEDEN (SOFC)

Lynntech, Inc., Texas, USA (PEM)

Manhattan Scientifics Inc., New Mexico, USA (PEM)

Massachusetts Institute of Technology, Massachusetts, USA (PEM, SOFC)

Materials and Electrochemical Research Corporation, Arizona, USA (PEM)

M-C Power Corporation, Illinois, USA (MCFC)

McDermott Technology, Inc., Ohio, USA (PEM, SOFC)

Mitsubishi Electric Corporation, JAPAN (PAFC)

Mitsubishi Heavy Industries, Inc., New York, USA (PEM & SOFC)

MTU Friedrichshafen GmbH, GERMANY (MCFC)

More Energy Ltd., ISRAEL (PEM)

National Aeronautics and Space Administration, Ohio, USA (regenerative FCs)

National Aerospace Laboratory, JAPAN (PEM)

National Fuel Cell Research Center, California, USA

National Renewable Energy Lab, Colorado, USA (PEM)

Netherlands Energy Research Foundation, NETHERLANDS (PEM, MCFC and SOFC)

NexTech Materials, Ltd., Ohio, USA (PEM & SOFC)

Noguchi Institute, JAPAN (PEM)

ONSI Corporation, Connecticut, USA (PAFC)

Ontario Hydro Technologies, Ontario, CANADA (SOFC)

Pacific Northwest National Laboratory, Washington, USA (PAFC, MCFC and SOFC)

Phoenix Fuel Cell Systems, Arizona, USA (PEM, SOFC)

Plug Power, LLC, New York, USA (PEM)

Procyon Power Systems, Inc., California, USA (AFC, PEM)

Proton Energy Systems, Connecticut, USA (PEM, Regenerative)

Refrac Systems, Arizona, USA

Rocky Mountain Institute, Colorado, USA (PEM)

Sandia National Labs, New Mexico, USA

Schafer Corporation, California, USA (PEM)

Schatz Energy Research Center (SERC), California, USA (PEM)

Siemens AG, Erlangen, GERMANY (PEM)

South Coast Air Quality Management District, California, USA (PAFC, PEM)

Southeastern Technology Center, Georgia, USA (PEM)

Southern States Power Co., Louisiana, USA (PEM)

Southwest Research Institute, Texas, USA (PEM)

Sulzer Hexis Ltd., SWITZERLAND (SOFC)

TATA Energy and Resources Institute (TERI), INDIA (MCFC)

TNO Energy & Environment, Apeldoorn, NETHERLANDS (PEM)

Toshiba Corporation, Yokohama, JAPAN (PAFC and PEM)

Toyota Motor Corporation, JAPAN (PEM)

United States Department of Energy (main), Washington D.C., USA (PAFC, PEM, MCFC and SOFC)

United States Department of Energy (Office of Transportation Technologies), Washington D.C., USA (PAFC and PEM)

United Technologies Research Center (UTRC), Connecticut, USA (PAFC and PEM)

VTT Chemical Technology, FINLAND (PEM)

Warsitz Enterprises, California, USA (PEM)

Westinghouse Savannah River Company, Georgia, USA (PEM, SOFC)

Worchester Polytechnic Institute, Massachusetts, USA (PEM)

XCELLSIS, Kirchheim/Teck-Nabern, GERMANY (PEM)

ZeTek Power PLC, London, ENGLAND (Alkaline)

Zevco, Kent, UNITED KINGDOM (AFC)

ZSW, Center for Solar Energy & Hydrogen Research, Ulm, GERMANY (PEM, MCFC and SOFC)