• Columbus Industries

• Consolidated Chemex Corp.

• Control Chief Corp.

• Control Systems International, Inc.

• Controlotron Corp.

• CountryPlank

• Coxreels

• Croll-Reynolds Co.

• Crystal Fountains

• Custom Caseworks, Inc.

• DEVCO Design and Development

• Dake

• Dalton Electric Heating Co., Inc.

• Danair, Inc.

• Danos & Curole

• David Clark Co.

• Delphian Corp.

• Deluxe Storage Systems

• Des Champs Laboratories Incorporated

• Design Collective, Inc.

• Design Tech International, Inc.

• Devar, Inc.

• Diamond Water Systems

• Dimetrics

• Dixie Diamond Mfg.

• Dixon Construction