Apple is known, among other things, for its impressive set of trademarks, and its vigorous defense of those marks. But even Apple doesn’t win every time. The company recently attempted to register the term MULTI-TOUCH as a trademark. The United States Patent and Trademark Office rejected the application on the grounds that it was “merely descriptive” of the product and not distinctive enough for people to immediately associate the phrase “multi-touch” with Apple’s products. Descriptiveness is a common issue in trademark law. A descriptive term, a term that is used to describe the functions, characteristics, size, or components of a…