| Business | Phone |
| Brown Laboratory 302 Sw Watson Ave, Topeka 66606 | (785) 233-3174 |
| Discovery Engineering Intl 3115 Sw Westwood Dr, Topeka 66614 | (785) 272-3781 |
| Lohmann & Rauschler Inc 6700 Sw Topeka Blvd, Topeka 66619 | (785) 862-1100 |
| Marketing International Inc 3634 Sw Willow Brook Ct, Topeka 66614 | (785) 272-4773 |