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n. a distinctive design, picture, emblem, logo or wording (or combination) affixed to goods for sale to identify the manufacturer as the source of the product. Words that merely name the maker (but without particular lettering) or a generic name for the product are not trademarks. Trademarks may be registered with the U.S. Patent Office to prove use and ownership. Use of another's trademark (or one that is confusingly similar) is infringement and the basis for a lawsuit for damages for unfair competition and/or a petition for an injunction against the use of the infringing trademark.