- Radio & Television Repair Shops , Old Saybrook - TV Repair
- Radiotelephone Communications, Old Saybrook
- Radon Testing & Services, Old Saybrook
- Railroad Companies, Old Saybrook
- Real Estate, Old Saybrook - Agent, Broker & Companies
- Real Estate Agent & Broker Services, Old Saybrook
- Real Estate Agent - Property Lessors, Old Saybrook
- Real Estate Appraiser, Old Saybrook - Appraisal Services
- Real Estate Appraisers & Consulting Services, Old Saybrook
- Real Estate Broker, Old Saybrook
- Real Estate Developers, Old Saybrook
- Real Estate Management, Old Saybrook
- Real Estate Properties, Old Saybrook
- Real Estate Property Investment Properties, Old Saybrook
- Real Estate Rentals, Old Saybrook
- Real Estate Services, Old Saybrook
- Recreational Equipment Repair & Service, Old Saybrook
- Recreational Services, Old Saybrook
- Recycling Drop-Off Centers, Old Saybrook
- Reducing Exercise & Weight Control Services, Old Saybrook
- Refrigeration Repair & Service, Old Saybrook - Ac, Freezer, Refrigerator Repair
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- Refrigerator Sales, Service & Repair, Old Saybrook - Fridge
- Rehabilitation Centers, Products & Services, Old Saybrook
- Rehabilitation Specialists, Old Saybrook
- Religious Education, Old Saybrook
- Religious Goods & Church Supplies Stores, Old Saybrook
- Religious Organizations, Old Saybrook
- Relocation Services, Old Saybrook
- Rental Property Management, Old Saybrook
- Repair Services, Old Saybrook
- Research Services, Old Saybrook
- Residential Care Facilities, Old Saybrook
- Residential Construction Contractors, Old Saybrook - General Contractors
- Restaurants/Food & Dining, Old Saybrook
- Retail Book Stores, Old Saybrook
- Retirement & Estate Planning, Old Saybrook
- Retirement Communities & Home, Assisted Living & Apartments, Old Saybrook
- Retirement Planning Consultants & Services, Old Saybrook
- Roofing Consultants, Old Saybrook - Roofing Companies
- Roofing Contractors, Old Saybrook - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- RV & Campers Repair & Service, Old Saybrook
- RV Repair, Old Saybrook - Recreational Vehicle
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