?- Cummins Inc.
- Kirloskar Oil Engines Limited
- Yamaha Motor Co. Ltd.
- Yanmar Holdings Co. Ltd.
- Briggs & Stratton Corporation
- Mitsubishi Heavy Industries
Ltd.
- Perkins Engines Company Limited
- Deere & Company
- Caterpillar Inc
- Atlas Copco AB
- Honda Siel Power Products Limited