1. AFC Energy PLC
2. Air Liquide S.A.
3. AIR-N-GAS Process Technologies
4. Airro Engineering Co.
5. AmmPower Corp.
6. AMOGY Inc.
7. Borel Swiss
8. Crystec Technology Trading GmbH
9. Duiker Clean Technologies
10. Gaztron Engineering Private Limited
11. Johnson Matthey PLC
12. KBR Inc.
13. Linde PLC
14. MVS Engineering Pvt. Ltd.
15. Nanjing Kapsom Engineering Limited
16. NUBERG GROUP
17. Nutech Air Projects
18. Sam Gas Projects Pvt. Ltd.
19. Siemens AG
20. Suzhou Since Gas Technology Co. Ltd.
21. Technotherma (India) Pvt. Ltd.
22. ThyssenKrupp AG
23. Topsoe A/S
24. Yara International ASA