| Business | Phone |
| Power Monitors Inc 1913 Huguenot Rd, Richmond 23235 | (804) 897-0021 |
| Advance Technologies Inc 6403 Dickens Pl, Richmond 23230 | (804) 673-9939 |
| Lehman Engineering Co 11111 Ingallston Rd, Richmond 23233 | (804) 360-9288 |
| Brock Associates Inc 300 W Franklin St 104, Richmond 23220 | (804) 788-0015 |