Filters
- ABB
- Adams
- Agastat
- Allen-Bradley
- ALtech Corp
- ASEA
- Benedikt & Jager
- Bernstein
- Crouzet
- Cutler-Hammer
- Dayton
- Eaton
- Entrelec
- Fuji Electric
- Furnas
- General Electric
- IDEC
- IMO
- Kone
- LG
- Line Electric
- Lovato Electric
- Matsushita Electric
- Misc. Parts
- Mitsubishi Electric
- Moeller
- OLOF
- OMRON
- Otis
- Potter & Brumfield
- Schindler
- Schneider Electric
- Sees
- Siemens
- Sprecher+Schuh
- Stromberg
- Struthers-Dunn
- TC
- Telemecanique
- ThyssenKrupp
- Westinghouse
