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The following is a list of online trademark resources you may find useful in your research:
Trademark Databases
- USPTO Trademark Electronic Search System - TESS
- http://www.uspto.gov
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- USPTO Trademark Status and Document Retrieval - TSDR (formerly Trademark Application and Registration Retrieval System - TARR)
- http://tsdr.uspto.gov
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- USPTO Trademark Assignment Query Menu
- http://assignments.uspto.gov/assignments
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- USPTO Trademark Trial and Appeal Board Inquiry System - TTABVUE
- http://ttabvue.uspto.gov/ttabvue
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- Connecticut State Trademark/Business Name Search - Business Filings
- https://www.concord-sots.ct.gov
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- Canadian Trademarks Database
- https://www.ic.gc.ca
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- Trade Marks from the Patent Office of the United Kingdom
- http://www.patent.gov.uk
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- Madrid Express structured (Trademarks) Search
- http://www.wipo.int/ipdl/en/madrid
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- WIPO Gazette of International Marks
- http://www.wipo.int/madridgazette
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- WIPO ROMARIN (International Trademark Information Database)
- http://www.wipo.int/madrid/en/romarin
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- WIPO Article 6ter Structured Search (State Emblems, Official Hallmarks, and Emblems of Intergovernmental Organizations)
- http://www.wipo.int/ipdl
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- WIPO Appellations of Origin - Lisbon Structured Search
- http://www.wipo.int/ipdl/en/lisbon
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- WIPOLex - WIPO Collection of Laws for Electronic Access
- https://wipolex.wipo.int
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Trademark Classification Manuals and Search Guides
- USPTO Basic Facts about Trademarks
- http://www.uspto.gov
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- Making a Mark: An Introduction to Trademarks for Small and Medium-sized Enterprises - WIPO (Downloadable PDF)
- https://www.wipo.int/publications
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- International (Nice) Schedule of Classes
- https://www.uspto.gov/trademark
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- USPTO Acceptable Identification of Goods and Services Manual U.S. and International Classification numbers
- https://idm-tmng.uspto.gov/id-master-list-public
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- USPTO Design Code Search Manual
- http://tess2.uspto.gov/tmdb/dscm
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- Trademark Manual of Examining Procedure - TMEP
- http://tess2.uspto.gov/tmdb/tmep
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- USPTO Official Gazette - Trademarks: recent five weeks
- https://eog-tmng.uspto.gov
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- USPTO FAQ about how to use TESS to search for Native American Tribal Insignia
- https://www.uspto.gov/trademark/laws-regulations/native-american-tribal-insignia
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- Guide to the International Registration of Marks under the Madrid Agreement and the Madrid Protocol (Downloadable PDF)
- http://www.wipo.int/madrid/en/guide
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- International (Nice) Classification of Goods and Services
- https://www.wipo.int/classifications/nice
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- International Classification of the Figurative Elements of Marks - Vienna Classification
- https://www.wipo.int/classifications/vienna
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- European Union Intellectual Property Office - EUIPO - Trade Marks and Designs (formerly Office for Harmonization in the Internal Market - OHIM)
- https://euipo.europa.eu/ohimportal/en/trade-marks
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- Official Journal of the EUIPO (formerly OHIM)
- https://euipo.europa.eu/ohimportal/en/official-journal
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National and International Trademark Offices
- United States Patent and Trademark Office
- http://www.uspto.gov/main/trademarks
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- State Trademark Offices
- http:/martinwallace.net/ptdla
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- Canadian Trademark Services
- https://www.canada.ca/en/services/business/ip/trademarks
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- Industrial Property Digital Library - Japan
- http://www.ipdl.ncipi.go.jp
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- Community Trade Mark System Services - European Union
- https://euipo.europa.eu
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- WIPO Trademark Gateway
- http://www.wipo.int/trademarks
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