1. AccuBeat Ltd.
2. Adtran Networks SE
3. AOSense Inc.
4. Bel-Art by SP Scienceware
5. Brandywine Communications
6. Excelitas Technologies Corp.
7. Frequency Electronics Inc.
8. IQD Frequency Products Ltd.
9. Leonardo S.p.A.
10. Meinberg Funkuhren GmbH & Co KG.
11. Microchip Technology Inc.
12. Optm Inc.
13. Safran S.A.
14. Shanghai Astronomical Observatory
15. Stanford Research Systems Inc.
16. Teledyne Technologies Incorporated
17. Thermo Fisher Scientific Inc.
18. TimeTech GmbH
19. Trimble Inc.
20. VREMYA-CH JSC
21. Zurich Instruments AG