1. B & H Manufacturing Inc.,
USA.
2. Black Machine Planters,
USA
3. Crustbuster Speed King Inc.,
USA.
4. John Deere, USA
5. Flexi Coil, USA
6. Great Plains Mfg Inc,
USA.
7. Kuhn Farm Machinery Inc.,
USA
8. Landoll Corporation,
USA.
9. Powell Manufacturing Company Inc,
USA.
10. White-New Idea, USA
11. White Planters, USA