- Raw Products, Millstone Township
- Real Estate, Millstone Township - Agent, Broker & Companies
- Real Estate Appraisers & Consulting Services, Millstone Township
- Real Estate Consultants, Millstone Township
- Real Estate Management, Millstone Township
- Real Estate Services, Millstone Township
- Record Destruction Service, Millstone Township
- Record Storage, Destruction & Management, Millstone Township
- Recording Studio - Equipment & Rental, Millstone Township
- Rehabilitation Centers, Products & Services, Millstone Township
- Rehabilitation Specialists, Millstone Township
- Rehabilitational Job Training Services, Millstone Township
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- Religious Organizations, Millstone Township
- Repair Services, Millstone Township
- Research & Development Labs, Millstone Township - Laboratories
- Research Services, Millstone Township
- Residential Construction Contractors, Millstone Township - General Contractors
- Restaurants/Food & Dining, Millstone Township
- Retirement Communities & Home, Assisted Living & Apartments, Millstone Township
- Riding & Rodeo Services, Millstone Township
- Rods, Springs & Suspension Equipment & Supplies, Millstone Township
- Roofing Consultants, Millstone Township - Roofing Companies
- Roofing Contractors, Millstone Township - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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