• DoorKing, Inc.

• A D T Security Services

• A.C. Dellovade, Inc.

• ADT

• AMP

• Aiphone Intercom Systems

• Alpha Communications

• Amano Cincinnati Canada Inc.

• Amtel Parking Security Control

• Antech Corp.

• Apex Building Systems, Inc.

• Atkinson Dynamics Co.

• Atlas Sound

• Auth Chimes/AuThentic Parts

• Bay Insulation's Metal Building Insulation division

• Berk-Tek

• Blonder Tongue Laboratories

• Bosch Security Systems, Inc.

• Brim Electronics

• Broan-NuTone Canada

• Broan-NuTone, LLC.

• Burton Signs & Specialties Inc.

• Bussmann Division Cooper Industries

• CITEL, Inc.

• CORNELL Communications

• CPE/APE

• Cabinet Mountain Log Works

• Cansec Systems Ltd.

• Carlon, Lamson & Sessions

• Chubb Security Systems

• Clauss Tools

• Compuquest, Inc.

• Conestoga Log Cabins

• Cooper B-Line Systems

• Corr: Thomas Corr Associates

• Crescent Electric Supply Co.

• DADCO Corporation

• DFE Communications Corp.

• Dukane Corp.

• Edwards Signals

• Energy Automation Systems, Inc.

• Executive Information Systems

• Exotic Hardwoods & Veneers

• Fanon Courier

• Federal Signal Corp/Electrical Products

• Fiber Options

• Forest Products Associates

• Framatome Connectors International

• Geist Manufacturing, Inc.

• Generac Power Systems

• Great Lakes Professional Painting, Inc.

• Grommes-Precision Electronics

• HM Electronics

• Haven Technology Corp.

• Howland Electric and Electronics Wholesale Company

• Hubbell Canada Inc.

• Hubbell Premise Wiring

• IDEX Corporation

• IMC Power

• Intercon Security Ltd.

• Jeron Electronic Systems

• Johnson Controls, Inc.

• K D M Electronics Inc.

• Kelly Systems

• Keystone Wire & Cable

• Lee Dan Communications

• Lowell Manufacturing Company

• Lucent Technologies

• Lyncole Industries, Inc.

• M & S Systems

• MCS Communication Products

• Management Science Associates

• Manhattan/CDT

• Marmon Mok

• Meridian Technologies

• Mohawk/CDT

• Molex

• Morrow Wave

• Motorola Canada Ltd.

• Multiplex Technology

• Nicholas Evanoff Company

• NuTone

• Nutone Electrical Ltd.

• Ontario Parking Systems Ltd.

• Panduit Corp.

• Pass & Seymour/Legrand

• Pittsburgh Stained Glass Studios

• Quam-Nichols Co.

• R F Industries Ltd.

• Ranier Devido Stone Company

• Rauland-Borg (Canada) Inc.

• Rauland-Borg Corp.

• Record/Play Tek

• Rolatape Corp.

• Rutherford Controls Ltd.

• Sage Technology Solutions, Inc.

• Seatek Co.

• Security Chimneys International

• Select Engineered Systems

• Siemon Co.

• Simplex International Time Equipment Company Ltd.

• Simplex/Grinnell

• Sound Elevator Co./Entry Plus

• Strait Manufacturing & Welding, Inc.

• Superior Essex

• TOA Electronics

• Talk-A-Phone Co.

• TekTone Sound & Signal Mfg.

• Telephonics Corp.

• Telular Corporation

• The Wiremold Company

• Thomas & Betts Electrical

• Tristate & Electric & Electronics Supply Co.

• Tuckahoe Metal & Roofing, Inc.

• Tyton Hellermann, Canada

• Tyton Hellermann, USA

• USA CCTV Mfg.

• Vandal-Proof Products

• Vista F.R.P Products Ltd.

• Wavetek Corp.

• Wheelock, Inc.

• Zenitel USA

• Zetron

• Zoom Telephonics