| Business | Phone |
| Astrol Instrument 11496 Portlance St, Detroit 48205 | (313) 839-9133 |
| Beacon Instrument Svc Inc 11496 Portlance St, Detroit 48205 | (313) 526-6040 |
| Ideal Engineering & Design 2525 Clark St, Detroit 48209 | (313) 843-6259 |
| Us Construction Restoration 8225 Lyndon St, Detroit 48238 | (313) 933-7488 |