| Company | Category | Area | Address | Web | E-mail | Contact person |
| JOHN MENGES TRUCKING INC | Trucking-Local Cartage | Maryland | 4405 NATIONAL PIKE, GRANTSVILLE, Garrett, Maryland, 21536-1135, USA |
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John Menges |
| JOHN MEYERHOFF MD | Physicians & Surgeons | Maryland | 2435 W BELVEDERE AVE STE 21, BALTIMORE, Baltimore City, Maryland, 21215-5224, USA |
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John Meyerhoff |
| JOHN MICHAEL VALEK | Engineering Consulting | Maryland | 1305 GIBBS CT, BEL AIR, Harford, Maryland, 21014-2741, USA |
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John Valek |
| JOHN MORGAN & ASSOC | Loose Leaf Equipment Systs & S | Maryland | 8260 PRESTON CT, JESSUP, Howard, Maryland, 20794-9676, USA |
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John Morgan |
| JOHN MORRELL & CO | Meat-Wholesale | Maryland | 905 AUTUMN VALLEY LN, GAMBRILLS, Anne Arundel, Maryland, 21054-1216, USA |
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| JOHN MOTLEY ASSOC | Manufacturers-Agents & Represe | Maryland | 6100 FROST PL, LAUREL, Prince Georges, Maryland, 20707-2928, USA |
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John Motley |
