- Radio & Tv Communications Equipment Manufacturers, Clarkston
- Radiotelephone Communications, Clarkston
- Real Estate, Clarkston - Agent, Broker & Companies
- Real Estate Services, Clarkston
- Recording Studio Service - Sound & Video, Clarkston
- Records, Tapes, CDs - Used & Vintage, Clarkston
- Refuse Collection & Disposal Services, Clarkston
- Religious Organizations, Clarkston
- Repair Services, Clarkston
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- Research & Development Bureaus, Clarkston - Commercial, Economic, Sociological & Educational Research
- Research Services, Clarkston
- Residential, Clarkston
- Residential Apartments, Clarkston
- Residential Care Facilities, Clarkston
- Resorts & Hotels, Clarkston
- Restaurants/Food & Dining, Clarkston
- Rooming & Boarding Houses, Clarkston
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