- Tank & Pipe Working Industrial Equipment, Louisville
- Tanning Salons, Louisville
- Tattoo Covering & Removing, Louisville
- Tattooing, Louisville
- Tax Consultants, Louisville
- Tax Planning, Louisville
- Tax Preparations Electronic Filings, Louisville
- Tax Return Preparation, Louisville
- Tax Services, Louisville
- Technical Consultants, Louisville
- Technology Transfer Consultants, Louisville
- Teeth Whitening Products, Louisville
- Teeth Whitening Products & Services, Louisville
- Telecommunications, Louisville
- Telecommunications Companies, Businesses & Services, Louisville
- Telephone Answering Service, Louisville - Messenger Services
- Telephone Communication Service & Phone Companies, Louisville - Local & Long Distance Telephone Service
- Telephone Wire & TV Cable Contractors, Louisville - Phone Jack - Wiring Installation
- Temp Agencies, Louisville
- Temporary & Contractor Agencies, Louisville
- Tennis Equipment & Supplies Stores, Louisville - Racquets, Shoes, Balls, Bags, Clothing & Accessories
- Tents, Canopies & Awnings, Louisville
- Testing Laboratories, Louisville - Lab Tests
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- Thai Restaurants, Louisville
- Theater & Sport Ticket Agencies, Louisville
- Thoracic Surgeons, Louisville - Thoracic Surgery Doctors & Physicians
- Thrift Stores, Resale & Consignment Shops, Louisville
- Tires - Wholesale & Retail, Louisville
- Title & Surety Insurance, Louisville
- Tools & Hardware Supplies, Louisville
- Tourist Attractions, Louisville
- Tower & Power Line Contractors, Louisville
- Towers Buildings & Antennas, Louisville
- Towing Service, Louisville
- Toy Stores, Louisville
- Trading Posts, Louisville
- Transportation, Louisville
- Transportation Contract Service, Louisville
- Transportation Rental & Leasing, Louisville
- Travel & Tourism, Louisville
- Travel Arrangement & Services, Louisville
- Truck Rental & Leasing, Louisville - Rent a Truck & Tractor
- Truck Repair & Service, Louisville
- Trust And Will Attorneys & Lawyers, Louisville
- Trust And Will Lawyers & Attorneys, Louisville
- TV Stations & Broadcasting Companies, Louisville - Cable TV Networks, Talk Shows, etc
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