| Business | Phone |
| Umd Technology Inc 14945 Sw Sequoia Pkwy, Portland 97224 | (503) 419-4660 |
| Wyeast Technology Llc 1020 Sw Taylor St # 205, Portland 97205 | (503) 222-2663 |
| Barrett & Assoc Engineering Po Box 19847, Portland 97280 | (503) 245-0325 |
| Lewis Sternberg 8005 Nw Hawkins Blvd, Portland 97229 | (503) 464-0333 |