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U.S. trademark law[]

A certification mark is

any word, name, symbol, device, or any combination, used, or intended to be used, in commerce by someone other than its owner, to certify regional or other ori­gin, material, mode of manufacturer, quality, accuracy or other characteristics of goods or services, or that the work or labor on the goods or services was performed by members of a union or other organization.[1]


An exam­ple of a certification mark is the Underwriters Laboratories’ “UL” mark, which certifies the safety standards of electrical equipment.


  1. USPTO, Glossary (full-text).