Answered By: Tracy Hull
Last Updated: Oct 30, 2015     Views: 15

To check if a company name or trademark is in use:

SEC EDGAR (public companies required to register with SEC):
http://www.sec.gov/edgar/searchedgar/webusers.htm

State government information (all states - from Library of Congress): http://www.loc.gov/rr/news/stategov/stategov.html

US Patent and Trademark Office (searchable):
http://www.uspto.gov

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