Free Business Name Check Tools- Check If a Business Name is Taken
Google Search with the Business Name
There is no better way to begin checking if a business name is taken than a Google search. Every business tries to be listed in Google's search results. Search in Google with your proposed business name. The results will list all who are using the name on the web. You may even include your state or city in the search to see if someone is using it in your area too.
You can also use other search engines, like Bing, before moving ahead.
Fictitious Name Databases
Another place to check is with the county clerk's office of the county where you plan to operate your business. Searching this list helps you find even tiny organizations that carry the same name.
Check with Secretary of State
Check with Secretary of State to make sure that no one in the area has the same name that you have in mind - for your business. You may contact your state’s Secretary of State using any of the following links:
State Filling Office
Check with State Filling Office if they have any LLC, limited partnership or corporation registered with a similar name that you are considering for your business.
USPTO's Free Trademark Database
It is also important to search for federally registered trademarks. You can do it using the free trademark database on the USPTO's website.
Other Free Resources:
You can search other Internet free databases like http://www.hoovers.com/free or http://www.thomasnet.com and see if they have a business listed with same or similar name you plan to use.
The following page offers you tips to analyze these search results. It also details cases where you can use an existing business name.