1. APC International
Ltd.
2. Bayern International
3. CEDRAT TECHNOLOGIES
4. CeramTec GmbH
5. HE SHUAI
6. Johnson Matthey
7. KYOCERA Corporation
8. Murata Manufacturing Co. Ltd.
9. NGK Insulators
Ltd.
10. Omega Piezo Technologies
11. PI Ceramic GmbH
12. PI L.P.
13. Piezo Motion Corp.
14. TAIYO YUDEN CO. LTD.
15. TDK Electronics AG
16. Weifang Jude Electronic Co. Ltd.