1. Envision Energy Aps, Silkeborg, Denmark
2. ECO 5 GmbH, Bonn, Germany
3. Jeumont Electric, Jeumont, France
4. Faculty of Science and Technology, University of Twente, Enschede, AE, The Netherlands
5. Theva Dünnschichttechnik GmbH, Ismaning, Germany
6. Fraunhofer Institute for Wind Energy Systems, Bremerhaven, Germany
7. Sumitomo (SHI) Cryogenics of Europe GmbH, Darmstadt, Germany
8. Sumitomo (SHI) Cryogenics of America, Inc., Allentown, PA, USA