- Radiator Coolant & Solvents, East Hartford - Engine Coolant
- Radiator Repair, East Hartford - Gas Tank Repair
- Radiator Repair & Rebuild, East Hartford
- Radio Communications Equipment Service & Repair, East Hartford
- Radiology Equipment & Services, East Hartford - X-Ray Equipment & Supplies
- Real Estate, East Hartford - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, East Hartford
- Real Estate Appraiser, East Hartford - Appraisal Services
- Real Estate Appraisers & Consulting Services, East Hartford
- Real Estate Developers, East Hartford
- Real Estate Management, East Hartford
- Real Estate Rentals, East Hartford
- Real Estate Services, East Hartford
- Recording Studio - Equipment & Rental, East Hartford
- Recording Studio Service - Sound & Video, East Hartford
- Recreational Equipment & Supplies Companies, East Hartford
- Recycling Drop-Off Centers, East Hartford
- Recycling Scrap & Waste Materials, East Hartford - Scrap Metal, etc
- Red Cross, East Hartford
- Refrigeration Repair & Service, East Hartford - Ac, Freezer, Refrigerator Repair
- Refrigerator Sales, Service & Repair, East Hartford - Fridge
- Rehabilitation Centers, Products & Services, East Hartford
- Rehabilitation Specialists, East Hartford
- Rehabilitational Job Training Services, East Hartford
- Religious Organizations, East Hartford
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- Relocation Services, East Hartford
- Rental & Leasing Business Equipment, East Hartford
- Repair Services, East Hartford
- Research & Development Labs, East Hartford - Laboratories
- Research Services, East Hartford
- Residential, East Hartford
- Residential Apartments, East Hartford
- Residential Care Facilities, East Hartford
- Residential Construction Contractors, East Hartford - General Contractors
- Resorts & Hotels, East Hartford
- Restaurant & Lounge, Bar, Or Pub, East Hartford
- Restaurant Equipment, East Hartford
- Restaurant Equipment & Supplies, East Hartford
- Restaurant Supplies & Equipment, East Hartford
- Restaurants/Food & Dining, East Hartford
- Retail Book Stores, East Hartford
- Retirement Communities & Home, Assisted Living & Apartments, East Hartford
- Retirement Home Referral Service, East Hartford - Nursing Home & Care Facilities Referrals & Information
- Riding Equipment, East Hartford
- Road Construction, East Hartford - Companies & Contractors
- Roadside Assistance, Road Service & Towing Service, East Hartford
- Rodeo & Equestrian Equipment & Supplies, East Hartford
- Roofing Consultants, East Hartford - Roofing Companies
- Roofing Contractors, East Hartford - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, East Hartford
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