• AAA Glass Company Inc.

• ACI Distribution

• Aluflam

• Arch Aluminum & Glass Co., Inc.

• Automatic Doors Of The Midwest Inc.

• Avanti Systems

• Boon Edam, Inc

• Crane Revolving Door Company

• Door-Man Manufacturing Company

• Door-Man Mfg. Co.

• Dor-O-Matic Closers

• Dor-O-Matic Inc

• EFCO Corporation

• Elbex Corporation

• Ellison Bronze, Inc.

• Etchlite Technology Inc

• Floral Glass & Mirror Inc.

• Glasslam

• Horton Automatic Doors

• Horton Automatics

• International Revolving Door Inc.

• Jomade International, Inc.

• NanaWall Systems Inc.

• Nathan Allan Glass Studios Inc.

• Niche Architectural Inc.

• North American Glass

• O & W Glass

• Pacific Bulletproof Co.

• Patio Enclosures

• Protective Armored Systems

• Schott North America Inc.

• Skyline Sky-Lites, LLC

• Stained Glass Overlay of Central Illinois

• Structural Glass

• United Glass Corporation

• United Tempering Systems

• Wikk Industries, Inc.

• YKK AP America Inc.

• Zeledyne