3M
Allegheny Technologies Incorporated
AGY Holding Corp.
CeramTec GmbH
CoorsTek Inc.
Compagnie de Saint-Gobain SA
DSM NV
Honeywell International Inc.
E. I. Du Pont De Nemours and Company
Morgan Advanced Materials
Royal TenCate NV
PPG Industries Inc.
Saab AB
Tata Steel Limited
Saint-Gobain SA