- Siemens AG
- Hitachi Ltd
- Koninklijke Philips NV
- General Electric
- Oxford Instruments PLC
- Toshiba Electr?n Tubes & Devices Co. Ltd
- Brand X-ray Tube Co. Inc.
- Malverin Panalytical Ltd
- Lafco India Scientific Industries
- YXLON International
- Varex Imaging Corporation