- Allan J. Coleman Co.
- Central Oklahoma Winnelson
- Duracable Manufacturing Co.
- General Pipe Cleaners, div. of General Wire Spring
- Hermann Sewerin GmbH
- J.M. McKinney Co.
- Lansas Mfg. by Vanderlans & Sons Inc.
- MyTana
- Pulsar 2000, Inc.
- Ratech Electronics, Ltd.
- Superior Signal Company LLC
- Vivax-Metrotech Corp.
- Western Drain Supply
