1. Accuratus Corp
2. Advanced Glass Industries
3. AGC Inc.
4. China Glass Ceramic Inc.
5. Compagnie de Saint-Gobain S.A.
6. Corning Inc.
7. Dongguan Hong Tai Glass Products CO.LTD
8. Elan Technology
9. EUROKERA Group
10. Ilva Glass spaIlva Glass spa
11. INSACO Inc.
12. Morgan Advanced Materials plc
13. Nippon Electric Glass Co.Ltd.
14. Ohara Corporation
15. Precision Ceramics USA
16. Schott AG
17. Wenzhou Kanger Crystallite Utensils Co. Ltd.