| Business | Phone |
| James L Scharmota Licensed 17665 Se Mcloughlin Blvd, Portland 97267 | (503) 513-5339 |
| Stone Calf Polygraphs Portland 97201 | (503) 830-2569 |
| Derry L York & Assoc 1130 Sw Morrison St # 220, Portland 97205 | (503) 241-8168 |
| K L Simmons Lie Detection Labs 8305 Se Monterey Ave # 220f, Portland 97266 | (503) 654-7327 |