| Business | Phone |
| Adcor Industries 910 Grundy St, Baltimore 21224 | (410) 327-6816 |
| Complex Manufacturing 1202 S East Ave, Baltimore 21224 | (410) 327-2354 |
| Dimensional Productions 669 Melvin Dr, Baltimore 21230 | (410) 837-7138 |
| Eastern Scientific Inc 4402 Greenway, Baltimore 21218 | (410) 243-9800 |
| G David Works Inc 2019 Jolly Rd, Baltimore 21209 | (410) 486-0608 |
| Quasar Factory Servicenter 1638 Sulphur Spring Rd, Baltimore 21227 | (410) 242-2607 |
| 7th Millennium Mfg Co 7 Millennium Way, Baltimore 21227 | (410) 875-9088 |
| Sullivan Products 1 N Haven St, Baltimore 21224 | (410) 732-3500 |
| Theatre Service & Supply Corp 1792 Union Ave, Baltimore 21211 | (410) 467-1225 |