| Business | Phone |
| Zick Quick Cincinnati 45202 | (513) 421-1189 |
| Bassett Polygraph Svc 151 W 4th St # 1l, Cincinnati 45202 | (513) 421-9604 |
| Von Holle Polygraph & Assoc 2200 Van Blaricum Rd, Cincinnati 45233 | (513) 467-6600 |
| Clark-Dye & Assoc Inc 10921 Reed Hartman Hwy # 224, Cincinnati 45242 | (513) 891-8869 |
| Michael P Monahan 630 Vine St, Cincinnati 45202 | (513) 579-8488 |
| Scientific Truth Verification 125 E 9th St # 400a, Cincinnati 45202 | (513) 621-6229 |
| Tri-State Polygraph Assoc 4030 Mount Carmel Tobasco Rd, Cincinnati 45255 | (513) 528-6717 |