- ABB - Asea Brown Boveri
- Allen Bradley
- Ajax
- ASI - Affiliated Semiconductors
- Amps Abundant
- Ansaldo
- Arburg
- Argo
- BBC - Brown Boveri
- Benshaw
- Bucyrus
- C&H
- CAT - Caterpillar
- Clark
- Crown
- Crydom - Gentron
- Cutler Hammer
- Darrah Electric
- Diodes Inc
- EDI - Electronic Devices Inc
- Emerson
- Eupec
- Exsys
- Fanuc
- Fagor
- Fuji
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- Galco
- GEC Plessey
- General Electric
- Harnischfeger
- Hitachi
- Hyster
- Inductoheat
- Inductotherm
- Infineon
- IR - International Rectifier
- Ixys
- Komatsu
- Kyocera
- LeTourneau
- Liebherr
- Littelfuse
- Marion
- MicroSemi
- Mitsubishi Electric
- Motorola
- OEM Renewal Parts
- NBR
- Nihon
- NTE
- P&H
- Phillips ECG
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- Pillar
- Poseico
- Proton - Electrotex
- PWX - Powerex
- Raymond
- Reliance
- Sanrex
- Secowest
- Semiconductors Inc
- Semikron
- Semitronics
- Sevon
- Siemens
- SPCO - Silicon Power Corp
- ST Semicron
- Tairtron
- Teccor
- Terex
- Tocco
- Toshiba
- Unit Rig
- Vishay
- Westcode
- Westinghouse
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