- 3 S Industries
- 3 S Industries
- 3 S Industries
- 4-Way Electric
- Alseco Transformer Electric
- Alseco Transformer Electric
- Amveco Magnetics Inc
- Amveco Magnetics Inc
- Atlantic Transformers Inc
- Atw Electronics
- B G Laboratories Inc
- Badger Transformer Co Inc
- Basler Electric Co
- Basler Electric Co
- Beta Transformer Technology
- Bey Electronics
- Bowen Electronics
- Bowen Electronics
- Bowman & Bowman Inc
- Buffalo Transformer Corp
- Burkholder & Co
- Burkholder Brothers
- Burkholder Brothers Transport
- California-Sierra Transformer
- Coast Acm
- Coast Acm
- Controlled Magnetics Inc
- Current Controls Co
- Cypress Transformer Inc
- Diversatec Inc
- E & X Magnetics
- Edcor Electronics
- Electric Power Systems
- Electro-Coil Inc
- Elstor Sales Corp
- Energy Transformation Systems
- Frost Magnetics Inc
- Frost Magnetics Inc
- G & S Motor Equipment Co
- Garrett & Son Inc
- Geotronics
- GMW Enterprises Transformer
- Hi Rel Systems
- Hitran Corp
- Howard Industries Inc
- Howard Industries Inc
- Hunterdon Transformer Co
- Instrument Transformer Equip
- Intranco Inc
- Jerry's Electric
- Kentucky Assn-Electric Co-Ops
- Kuhlman Electric Corp
- Kuhlman Electric Corp
- Lenco Electronics
- Lenco Electronics
- Mag Associates
- Mag-Con Engineering Inc
- Magcomp
- Magcomp
- Magnecomp
- Magnetic Design Labs
- Magnetic Design Labs
- Magnetico Inc
- Magnetika Inc
- Magnetika Inc
- Marcie Electric Inc
- Mid West Electric Transformers
- Motom Electronics LLC
- Munzer Mfg Co
- Nix Electric Co
- Nutech Industries Inc
- Power Xf
- Power Xf
- Power Xf
- Precision Components Inc
- Precision Inc
- Precision Inc
- QSE Inc
- QSE Inc
- QSE Inc
- R T Technology
- Rapid Power Corp
- Regional Manufacturing Spec
- Roman Maunfacturing
- RPI Transformers
- Sentran Corp
- Shafer Magnetic Components
- Siemens Power Transmission
- Signal Transformer Co Inc
- Snc Mfg Co Inc
- Sola/Hevi-Duty
- South American Development Crp
- Southeastern Transformer Co
- Spectrum Transformer Co Inc
- Sun Transformer Corp
- Super Power Inc
- Swep North America
- Transcendar Transformers
- Transformer Electric Co
- Tro Maintenance & Repair
- Tro Maintenance & Repair
- Tro Maintenance & Repair
- Unique Lighting Systems
- Valley Fabrication Inc
- Virginia Transformer
- Waukesha Electric Systems
- Waukesha Electric Systems
- XZEL
