| Business | Phone |
| M & M Electric Motor Repair 205 Bucheimer Rd, Frederick 21701 | (301) 663-1100 |
| Planar Filter Co 5715 Industry Ln # 11, Frederick 21704 | (301) 874-3944 |
| Rsi Llc 4507 Metropolitan Ct, Frederick 21704 | (301) 874-3494 |
| Thompson Gas & Electric Svc 5708 Urbana Pike # G, Frederick 21704 | (301) 293-6110 |