- Machine Shop & Tool Repair Service, Howard Lake
- Machinery, Supplies & Equipment - Business Supplies Related, Howard Lake
- Machinery, Supplies & Equipment - Construction & Contractor Related, Howard Lake
- Mail Delivery Service, Howard Lake
- Major Appliances, Howard Lake - Household & Kitchen
- Manicurists & Pedicurists, Howard Lake
- Manufacturing, Howard Lake
- Manufacturing Products, Howard Lake
- Meat Market, Wholesale & Products, Howard Lake
- Medical Research, Howard Lake
- Medical Research & Development, Howard Lake - Medical Information & Research
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- Metal Finishers, Howard Lake
- Metal Plating & Polishing, Howard Lake
- Mining, Howard Lake
- Miscellaneous Government, Howard Lake
- Miscellaneous Professional, Howard Lake
- Mobile Home Parks & Communities , Howard Lake
- Monuments, Tombstones, Markers & Memorials, Howard Lake
- Motor Vehicle, Howard Lake
- Motor Vehicle Rental & Leasing, Howard Lake
- Moving Supplies & Equipment Rental, Howard Lake
- Moving Truck Rental , Howard Lake
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