Trademarks

As of November 30, 2023, the USPTO has retired TESS and replaced it with Trademark Search. https://tmsearch.uspto.gov/search/search-information Developers are still working on known issues, however, so full functionality may take a bit longer. The database includes "every trademark that's been registered or applied for." More information is available here. https://tmsearch.uspto.gov/help

Trademarks protect words, names, symbols, sounds, or colors that distinguish goods and services from those manufactured or sold by others and indicate the source of those goods.  Trademarks can be renewed for as long as they are being used in commerce. Since 1989, the Library of Science and Medicine (LSM) has been a depository library for United States patents and trademarks. 

The Patent and Trademark Resource Centers maintains a comprehensive list of online resources for patents and trademarks.  This list includes links to the intellectual property offices of various foreign countries as well as the United States Patent and Trademark Office.  A list of trademark databases with full descriptions of their coverage is also available.  Click on "Online Resources"  in the Navigation sidebar on the left side of their home page, or use the search button at the top right of the page to search "trademarks".