| Business | Phone |
| Spectrum Automation Controls Po Box 745298, Arvada 80006 | (303) 200-4264 |
| Schmit Engineering Corp 8248 Quay Dr, Arvada 80003 | (303) 423-8167 |
| David T Snow Phd & Assoc 9813 W 83rd Ave, Arvada 80005 | (303) 421-1167 |
| Gem Technologies Inc 5255 Marshall St, Arvada 80002 | (303) 420-7930 |