• LiftMaster

  LiftMaster is a leading global manufacturer of commercial door and gate operators and access control systems. We provide robust, intelligent solutions for managing access in diverse commercial and industrial environments.

• LiftMaster

• 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.