- Hair Care Professionals, Sylvania
- Hardware Stores, Sylvania
- Health & Medical, Sylvania
- Health And Medical Centers, Sylvania
- Healthcare Providers, Practitioners & Professionals, Sylvania
- Heating & Air-Conditioning Contractors, Sylvania - HVAC Contractors - Installation, Repair, Replace Service, etc
- Heating Contractors, Sylvania - Heating Systems - Installation & Repair
- Heavy Haul Trucking Companies, Sylvania - Heavy Equipment & Machinery Hauling & Transportation
- Historical Places & Services, Sylvania
- Holding Companies, Sylvania
- Home Furnishings, Sylvania - Home Decor Stores, Items & Accessories
- Home Health Care, Sylvania - Agencies & Services
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- Horse Stables, Sylvania
- Hospital, Dental & Medical Equipment & Supplies, Sylvania
- Hospitals, Sylvania
- Hotels & Motels, Sylvania
- Household & Commercial Appliances Stores, Sylvania
- Household Goods & Furniture Storage , Sylvania
- Human Behavior Consultants, Sylvania
- Human Resource Consultants, Sylvania
- Hunting & Fishing Preserves, Sylvania
- Hunting & Fishing Programs, Sylvania
- Hunting Trapping & Game Propagation, Sylvania
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