| Business | Phone |
| Tamarack Engineering 3903 Foss Rd, Minneapolis 55421 | (612) 788-6437 |
| Charles B Yancy Co 5735 Dupont Ave S, Minneapolis 55419 | (612) 861-4387 |
| Outsource Engineering 614 4th St Ne, Minneapolis 55413 | (612) 331-5995 |
| Radix Product Development Inc 2924 Anthony Ln, Minneapolis 55418 | (612) 781-9944 |