| Business | Phone |
| Barringer Laboratories Inc Golden 80401 | (303) 277-1689 |
| Rocky Mountain Laboratories 602 Park Point Dr # 101, Golden 80401 | (303) 526-9449 |
| Gaming Laboratories Intl 5926 Mcintyre St, Golden 80403 | (303) 277-1172 |
| Huffman Laboratories Inc 4630 Indiana St, Golden 80403 | (303) 278-4455 |