| Business | Phone |
| Broadview Instrumentation 7632 Hub Pkwy # 2, Cleveland 44125 | (440) 526-2911 |
| Vogt Technology 14625 Puritas Ave, Cleveland 44135 | (216) 476-0072 |
| Sypris Test & Measurement 950 Keynote Cir # 108, Cleveland 44131 | (216) 741-7040 |
| Energy Systems Svc 5821 Harper Rd, Cleveland 44139 | (440) 248-2600 |
| Shields Labs Inc 8191 Broadview Rd # 202, Cleveland 44147 | (440) 526-1166 |
| Petro Tech Electronics 1271 Winston Rd, Cleveland 44121 | (216) 382-1858 |