| Business | Phone |
| Vitec Inc 24755 Highpoint Rd # 2, Cleveland 44122 | (216) 464-4670 |
| Trans Metrics Inc 5325 Naiman Pkwy # E, Cleveland 44139 | (440) 248-2616 |
| Electric Speed Indicator Co 12234 Triskett Rd, Cleveland 44111 | (216) 251-2540 |
| Singleton Corp 3280 W 67th Pl, Cleveland 44102 | (216) 651-7800 |
| Fred W Hanks Co 25018 Lakeland Blvd, Cleveland 44132 | (216) 731-1774 |
| Life Systems Inc 24755 Highpoint Rd # 1, Cleveland 44122 | (216) 464-3291 |