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Research Guides

Washington State Corporate Names, Washington State Trademarks, Washington State Business Names & Licenses

For information about Corporate Names and State Trademarks Contact:

Office of the Secretary of State
Corporations Division
Dolliver Building
801 Capitol Way South
P.O. Box 40234
Olympia WA 98504-0234
(360) 725-0377

Corporations Registration Search
Washington State Secretary of State
Corporations Division

For information about State Trade Names/Business Names and Licenses contact:

State of Washington
Business Licensing Service
PO Box 9034
Olympia, WA 98507-9034
Phone: 1-800-451-7985

Register My Business - Getting Started
Washington State Department of Revenue

"Plan Your Business"
Information about planning and starting a business in Washington State. (Business Licensing Service, Department of Revenue, State of Washington)

Business and Professional License Database
Washington State Department of Licensing

Business Look-up
Washington State Department of Revenue

State Trademark Resources

For information about state trademarks and service marks:

State Trademark Information Links from the USPTO
List of trademark resources for each state from the U.S. Patent & Trademark Office:  "To acquire trademark and/or service mark registration at the state level, applicants must file an application with the trademark office of the specific state in which protection is sought. For information about state registration requirements, applicants must contact the individual state trademark office."


While the Library reference service staff is happy to provide assistance with your search, we cannot perform searches, evaluate searches, assist with your application or dispense legal advice.

The University of Washington and its employees are providing a service of an informational nature with no express or implied warranty for results and assume no obligation or liability for damage arising out of the use, or inability to use, the information provided.  Every effort is made to keep this information up to date. However, errors and omissions may occur.

For the most up-to-date information or legal advice, please contact a patent or trademark attorney.