- Machinery, Supplies & Equipment - Business Supplies Related, Heavener
- Major Appliances, Heavener - Household & Kitchen
- Manufacturing, Heavener
- Martial Arts & Self Defense Schools, Heavener
- Meat Market, Wholesale & Products, Heavener
- Medical Groups & Clinics, Heavener - Medical & Health Centers
- Medical Supplies & Equipment, Heavener
- Mental Health Clinics, Heavener - Treatment Centers
- Mental Health Specialists, Heavener - Psychologist, Psychiatrist, Psychotherapist, etc
- Metal Buildings, Heavener - Kits, Homes, Steel Buildings, etc
- Methodist Church, Heavener
- Mexican Restaurants, Heavener
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- Mini & Self Storage, Heavener
- Mining, Heavener
- Mining Contractors, Heavener - Mining Companies, Contractors & Brokers
- Mining, Crude-Oil Production, Heavener - Mining Companies
- Miscellaneous Business Services, Heavener
- Miscellaneous Government, Heavener
- Miscellaneous Personal Services, Heavener
- Moldings Materials, Heavener
- Motor Vehicle, Heavener
- Motor Vehicle Rental & Leasing, Heavener
- Moving Truck Rental , Heavener
- Muffler Shop & Exhaust Systems, Heavener
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