- Ice Carvers, Seattle
- Ice Cream & Frozen Desserts, Seattle
- Ice Cream & Frozen Yogurt, Seattle
- Ice Cream Manufacturers Supplies & Equipment, Seattle
- Ice Sports Clubs & Instruction, Seattle
- Ice Wholesale, Seattle - Dry Ice
- Identification Equipment, Seattle
- Ignition Apparatus Manufacturers, Seattle
- Image Consultants Personal, Seattle
- Immigration & Naturalization Consultants, Seattle
- Immigration & Naturalization Services, Seattle
- Immigration And Naturalization Attorneys & Lawyers, Seattle
- Immigration Attorneys & Lawyers, Seattle - Naturalization
- Immigration Lawyers & Attorneys, Seattle - Naturalization
- Import Nonclassifiable Services, Seattle
- Import Products, Seattle
- Import Services, Seattle
- Imported Auto Parts, Seattle
- Importers, Seattle
- Imprinting & Embossing Services, Seattle
- In Home Services, Seattle
- Incense Retail, Seattle
- Indian Native American Arts & Crafts Retail, Seattle
- Indian Restaurants, Seattle
- Individual & Family Information & Referral Services, Seattle
- Individual & Family Services, Seattle
- Industrial & Commercial Cleaning Services & Companies, Seattle
- Industrial & Commercial Real Estate, Seattle
- Industrial & Commercial Real Estate Companies, Seattle
- Industrial & Heavy Equipment Repair & Service, Seattle
- Industrial & Heavy Equipment Vehicle Rental & Leasing, Seattle
- Industrial & Heavy Vehicle Dealers, Seattle
- Industrial & Personal Service Paper, Boxes & Cardboard, Seattle
- Industrial Contractors, Seattle
- Industrial Developers, Seattle
- Industrial Engineers & Designers, Seattle - Architectural Designers
- Industrial Engines, Seattle
- Industrial Equipment & Machinery, Seattle
- Industrial Equipment & Systems, Seattle
- Industrial Filters, Seattle
- Industrial Furnace, Seattle
- Industrial Generators, Seattle
- Industrial Goods & Products - Hard Goods - Large, Seattle
- Industrial Goods & Products - Hard Goods - Small, Seattle
- Industrial Goods & Products - Soft - Large & Small, Seattle
- Industrial Heat & Electrical Supplies & Equipment, Seattle
- Industrial Heaters & Boilers, Seattle
- Industrial Hygiene Consultants, Seattle
- Industrial Instrumentation, Seattle
- Industrial Lifts, Seattle
- Industrial Machinery Supplies & Equipment - Leasing & Rental, Seattle
- Industrial Patterns, Seattle
- Industrial Pump Repair & Service, Seattle - Centrifugal, Positive Displacement, Submersible, Diaphragm, Hydraulic, Water, Vacuum Pumps, etc
- Industrial Pumps, Seattle - Centrifugal, Positive Displacement, Submersible, Diaphragm, Hydraulic, Water, Vacuum Pump, etc
- Industrial Supply, Parts & Equipment - Miscellaneous, Seattle
- Industrial Tanks, Seattle
- Industrial Tools, Seattle
- Industrial Trucks, Seattle
- Industrial Vehicle Equipment & Supplies, Seattle
- Industrial Vehicle Repair, Seattle
- Industrial Waste Disposal, Seattle
- Industrial Waste Recycling, Seattle
- Industrial Waterway & Dock Construction, Seattle
- Industrial Winches, Seattle
- Industry, Seattle
- Infant & Baby Furniture & Equipment Stores, Seattle
- Infectious Disease Specialists, Seattle - Doctors, Physicians & Surgeons
- Information Bureaus, Seattle
- Information Bureaus & Services, Seattle
- Information Processing & Retrieval Systems, Seattle
- Information Retrieval Services, Seattle
- Information Technology Services, Seattle - IT Service
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- Infra Red Equipment & Services, Seattle
- Infrared Spectroscopy Testing Labs, Seattle
- Inks, Seattle
- Inks - Manufacturing, Seattle
- Insecticides, Termite & Pest Control, Seattle - Pesticides
- Inspection & Testing Services, Seattle
- Instrument Repair Service, Seattle
- Instruments, Seattle - Control Equipment
- Instruments & Control Equipment, Seattle
- Instruments Compasses, Seattle
- Insulation & Energy Conservation Materials, Seattle
- Insulation Contractors, Seattle - Blown-In, Spray Foam, Batt, Fiberglass, Attic Insulation Installation & Service
- Insulation Contractors Commercial & Industrial, Seattle
- Insulation Contractors Mechanical, Seattle
- Insulation Materials, Seattle - Foam, Cellulose, Fiberglass, Mineral Wool, Rockwool, etc
- Insulation Removal, Seattle
- Insurance Adjusters, Seattle
- Insurance Attorneys & Lawyers, Seattle
- Insurance Attorneys & Lawyers, Seattle
- Insurance Brokers, Seattle
- Insurance Carriers, Seattle
- Insurance Carriers By Specialty, Seattle
- Insurance Claim Processing Services, Seattle
- Insurance Consulting & Information Services, Seattle
- Insurance Dental, Seattle
- Insurance Disability, Seattle
- Insurance Farm, Seattle
- Insurance General Liability, Seattle
- Insurance Lawyers & Attorneys, Seattle
- Insurance Major Medical, Seattle
- Insurance Medical Examinations, Seattle
- Insurance Motorcycles, Seattle
- Insurance Personal, Seattle
- Insurance Renters, Seattle
- Insurance Risk Management & Loss Control, Seattle
- Insurance Services, Seattle
- Insurance Underwriters, Seattle
- Interdenominational Church, Seattle
- Interior Designers, Seattle
- Interior Designers & Decorators, Seattle
- Interior Designers Professional, Seattle
- Internal Medicine Doctors, Seattle - Internists Physicians & Surgeons
- International Affairs, Seattle
- International Trade Consultants, Seattle - Foreign Trade
- Internet & Online Auctions, Seattle
- Internet - Voice Application, Seattle
- Internet Development, Seattle
- Internet Entertainment, Seattle - Internet Services
- Internet Home Page Development & Consulting, Seattle
- Internet Marketing & Advertising Services, Seattle
- Internet Products - Hardware & Software Providers, Seattle
- Internet Providers, Seattle
- Internet Services, Seattle
- Internet Services Software & Design, Seattle
- Internet Websites, Seattle - Web Hosting, etc
- Inventory Management Services, Seattle - Inventory Service
- Investment Advisory Service Referrals, Seattle
- Investment Bankers, Seattle
- Investment Information & Referral Services, Seattle
- Investment Management Services, Seattle
- Investment Services & Advisors, Seattle
- Investments & Mutual Funds, Seattle
- Invitations & Announcements, Seattle - Baby Announcements, Wedding Invitations, Etc
- Invitations & Envelopes, Seattle
- Irish Restaurants, Seattle
- Iron, Steel & Metal Fabricators, Seattle - Fabrication Companies
- Irrigation Ditch Contractors, Seattle
- Irrigation Systems & Equipment, Seattle
- Irrigation Systems Repair & Service, Seattle
- Islamic Church, Seattle
- Italian Food Products, Seattle
- Italian Restaurants, Seattle
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