Final answer:
A phrase associated with a particular product is protected by trademark law, which identifies and distinguishes goods or services of one seller from others. Patent law protects inventions, while copyright law protects original works of authorship.
Step-by-step explanation:
A phrase that is associated with a particular product would be protected by trademark law.
Trademarks function to identify and distinguish the goods or services of one seller or provider from those of others, and to indicate the source of the goods or services. A trademark can be a word, phrase, symbol, and/or design that identifies and distinguishes the source of the goods or services of one party from those of others. Some examples of trademarks include brand names like 'Coca-Cola' and slogans like 'Just Do It' for Nike.
In contrast, patent law covers new and useful inventions or discoveries, and copyright law offers protection for original works of authorship like books, songs, and art. Although a phrase could arguably be copyrighted if it qualifies as a work of authorship in its own right, it is typically the trademark law that is directly involved in the protection of phrases associated with products or services.
Overall, when it comes to intellectual property protections, there are several areas of coverage, and each serves a distinct purpose in protecting different forms of creations.