- Racing Car Supplies, Downingtown
- Radio & Television Repair Shops , Downingtown - TV Repair
- Radio Communications Equipment & Systems , Downingtown
- Radiotelephone Communications, Downingtown
- Radon Testing & Services, Downingtown
- Ready Mix Concrete, Downingtown - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Downingtown
- Real Estate, Downingtown - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Downingtown
- Real Estate Appraiser, Downingtown - Appraisal Services
- Real Estate Appraisers & Consulting Services, Downingtown
- Real Estate Attorneys & Lawyers, Downingtown
- Real Estate Developers, Downingtown
- Real Estate Management, Downingtown
- Real Estate Services, Downingtown
- Recreation Management Services, Downingtown
- Recycling Drop-Off Centers, Downingtown
- Recycling Scrap & Waste Materials, Downingtown - Scrap Metal, etc
- Refrigerator & Freezer Equipment, Parts & Supplies, Downingtown
- Refrigerator Sales, Service & Repair, Downingtown - Fridge
- Refuse Systems & Garbage Disposal, Downingtown
- Rehabilitation Centers, Products & Services, Downingtown
- Rehabilitation Specialists, Downingtown
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- Religious Organizations, Downingtown
- Religious Practitioners, Downingtown
- Rental & Leasing Business Equipment, Downingtown
- Repair Services, Downingtown
- Residential, Downingtown
- Residential Apartments, Downingtown
- Residential Architect, Downingtown
- Residential Care Facilities, Downingtown
- Residential Construction Contractors, Downingtown - General Contractors
- Restaurant Equipment Cleaning, Downingtown - Restaurant Cleaners
- Restaurants/Food & Dining, Downingtown
- Retirement & Estate Planning, Downingtown
- Retirement Communities & Home, Assisted Living & Apartments, Downingtown
- Retirement Planning Consultants & Services, Downingtown
- Rigging Service & Crane Hoisting, Downingtown
- Road Construction, Downingtown - Companies & Contractors
- Road Construction & Repair Contractors, Downingtown
- Roof Cleaning & Maintenance, Downingtown - Roofing Services
- Roofing Consultants, Downingtown - Roofing Companies
- Roofing Contractors, Downingtown - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Downingtown
- Rv Parks, Downingtown
- Ryder Truck Rental , Downingtown - Ryder Moving
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