| Business Name | Address | |
| Capitol Lock Co | 14516 Macclintock Ct Glenwood, MD 21738 |
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| Catonsville Locksmith | Po Box 6671 Ellicott City, MD 21042 |
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| Bill'S Lock & Safe Co | Ellicott City, MD 21042 | |
| Centurion Safe & Lock Inc | Ellicott City, MD 21042 | |
| A P Locksmith & Security | Columbia, MD 21044 | |