- Machine Shop & Tool Repair Service, Davisburg
- Machine Shop Rotary Surface Grinding, Davisburg - Tool Grinding & Sharpening
- Machinery, Supplies & Equipment - Business Production Related, Davisburg
- Management Consultants & Services, Davisburg
- Manufacturing, Davisburg
- Manufacturing Products, Davisburg
- Masonry Contractors, Davisburg - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Davisburg
- Medical Research, Davisburg
- Medical Research & Development, Davisburg - Medical Information & Research
- Merchandise Sales Events, Davisburg
- Metal Products, Davisburg
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- Metal Working Machinery, Davisburg
- Methodist Church, Davisburg
- Miscellaneous Government, Davisburg
- Miscellaneous Manufacturing, Davisburg
- Miscellaneous Personal Services, Davisburg
- Mobile Home Parks & Communities , Davisburg
- Modular & Mobile Homes For Sale, Davisburg - Manufactured Homes Sale & Service
- Mortgage Bankers & Correspondents, Davisburg
- Motor Vehicle, Davisburg
- Motor Vehicle Rental & Leasing, Davisburg
- Moving Supplies & Equipment Rental, Davisburg
- Moving Truck Rental , Davisburg
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