- Radiator Coolant & Solvents, Port Hope - Engine Coolant
- Radio & Television Repair Shops , Port Hope - TV Repair
- Radio Communications Equipment & Systems , Port Hope
- Ready Mix Concrete, Port Hope - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Port Hope
- Real Estate, Port Hope - Agent, Broker & Companies
- Real Estate Agent & Broker Services, Port Hope
- Real Estate Appraiser, Port Hope - Appraisal Services
- Real Estate Appraisers & Consulting Services, Port Hope
- Real Estate Broker, Port Hope
- Real Estate Developers, Port Hope
- Real Estate Management, Port Hope
- Real Estate Services, Port Hope
- Record Storage, Destruction & Management, Port Hope
- Recreational Good Manufacturers, Port Hope
- Recreational Services, Port Hope
- Recycling Drop-Off Centers, Port Hope
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- Recycling Scrap & Waste Materials, Port Hope - Scrap Metal, etc
- Reducing Exercise & Weight Control Services, Port Hope
- Refrigerator Sales, Service & Repair, Port Hope - Fridge
- Refuse Collection & Disposal Services, Port Hope
- Refuse Systems & Garbage Disposal, Port Hope
- Rehabilitation Centers, Products & Services, Port Hope
- Rehabilitation Specialists, Port Hope
- Religious Organizations, Port Hope
- Repair Services, Port Hope
- Research Services, Port Hope
- Residential, Port Hope
- Residential Apartments, Port Hope
- Residential Care Facilities, Port Hope
- Restaurants/Food & Dining, Port Hope
- Retirement Communities & Home, Assisted Living & Apartments, Port Hope
- Roofing Consultants, Port Hope - Roofing Companies
- Roofing Contractors, Port Hope - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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