| Business | Phone |
| Electric Marine & Power 2101 E Pratt St, Baltimore 21231 | (410) 799-4118 |
| Kimberlite Assemblers Inc 113 N Collington Ave, Baltimore 21231 | (410) 675-4901 |
| Locke Insulators Inc 2525 Insulator Dr, Baltimore 21230 | (410) 752-8020 |
| Ngk Locke Inc 2525 Insulator Dr, Baltimore 21230 | (410) 347-1700 |
| Zentech Manufacturing 6980 Tudsbury Rd, Baltimore 21244 | (410) 561-7500 |