| Business | Phone |
| Jmc Instruments Inc 8122 Southpark Ln # 107, Littleton 80120 | (303) 794-8833 |
| Protech Sales Inc 9903 Titan Ct # 10, Littleton 80125 | (303) 471-0040 |
| Technical Sales Inc 6638 W Ottawa Ave # 130, Littleton 80128 | (303) 979-3619 |
| Gfr Technologies Inc 7604 W Quarto Ave, Littleton 80128 | (303) 979-2814 |