- Race Car Dealers, Montville
- Real Estate, Montville - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Montville
- Real Estate Developers, Montville
- Real Estate Properties, Montville
- Real Estate Property Investment Properties, Montville
- Real Estate Services, Montville
- Recycling Scrap & Waste Materials, Montville - Scrap Metal, etc
- Reformed Churches, Montville
- Refuse Collection & Disposal, Montville
- Refuse Systems & Garbage Disposal, Montville
- Rehabilitation Centers, Products & Services, Montville
- Rehabilitation Specialists, Montville
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- Religious Education, Montville
- Religious Organizations, Montville
- Repair Services, Montville
- Research & Development Bureaus, Montville - Commercial, Economic, Sociological & Educational Research
- Research Services, Montville
- Residential, Montville
- Residential Apartments, Montville
- Residential Care Facilities, Montville
- Residential Construction Contractors, Montville - General Contractors
- Restaurants/Food & Dining, Montville
- Riding & Rodeo Services, Montville
- Roofing Consultants, Montville - Roofing Companies
- Roofing Contractors, Montville - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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