1. APC International
Ltd.
2. Argo Technology Co. Ltd.
3. Beijing Oksultrasonic Group Co. Ltd
4. CeramTec GmbH
5. CTS Corporation
6. HE SHUAI
7. Johnson Matthey
8. Omega Piezo Technologies Inc.
9. Physik Instrumente (PI) GmbH & Co. KG
10. PI Ceramic GmbH
11. Piezo Technologies
12. Siansonic
13. SMART MATERIAL CORP.
14. Sparkler Ceramics Pvt. Ltd.