1. Airmaster Propellers Ltd.
2. Ameritech Industries Inc.
3. AMETEK Inc.
4. APC Propellers
5. Competition Aircraft Inc.
6. DUC H?lice Propellers Company
7. E-PROPS
8. FP-propeller
9. GENERAL ELECTRIC COMPANY
10. GRUPO ONE AIR AVIACION
S.L.
11. Hartzell Propeller Inc.
12. Hoffmann Propeller GmbH & Co. KG
13. Ivoprop Corporation
14. Leonardo S.p.A.
15. MT-Propeller Entwicklung GmbH
16. Performance Propeller LLC
17. Raytheon Technologies Corporation
18. Sensenich Propeller Company
19. Sensenich Wood Propeller Co
20. SUMITOMO PRECISION PRODUCTS Co. Ltd.
21. Textron Aviation Inc.
22. Univair Aircraft Corporation
23. Warp Drive Inc.
24. Whirl Wind Propellers Corporation
25. Woodward Hexcel