| Business | Phone |
| Applied Magnetics Lab 1404 Bare Hills Ave, Baltimore 21209 | (410) 583-2100 |
| Davis Inotek Instruments Llc 4701 Mount Hope Dr # J, Baltimore 21215 | (410) 243-4301 |
| Brimrose Pictures 5024 Campbell Blvd # E, Baltimore 21236 | (410) 931-7031 |
| Thermo Electron Corp Po Box 23737, Baltimore 21203 | (410) 435-8273 |