You may conduct a search free of charge on the USPTO Web site using the Trademark Electronic Search System (TESS) . You may also conduct a trademark search by visiting the Trademark Public Search Library, between 8:00 a.m. and 8:00 p.m. at the Public Search Facility, Madison East, 1st Floor, 600 Dulany Street, Alexandria, VA 22313. Use of the Public Search Library is free to the public. You may check on the status of an application or registration through the Trademark Applications and Registrations Retrieval (TARR) database. If you do not have access to the Internet, you can call the Trademark Assistance Center at 1-800-786-9199 or 1-571-272-9250 to check the status.
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