Final answer:
A trademark is indicated with the letters TM and is a mark legally registered or established by use as representing a company or product.
Step-by-step explanation:
A trademark is indicated with the letters TM. A trademark is a word, name, symbol, or device that is used in trade with goods to indicate the source of the goods and to distinguish them from the goods of others. Trademarks are legally registered or established by use as representing a company or product, such as the Nike "swoosh" on shoes or the distinctive red and white of a Coca-Cola can. Roughly 1.9 million trademarks are registered with the U.S. government and these can be renewed indefinitely, as long as they are in active use.