How Do I Obtain a Trademark?
In the United States you just start using the trademark, and if you're the first to do so, you own it. Often people refer to "trademarking" or registering their trademark. You don't have to register in order to obtain ownership over a trademark, but it helps.
Among the greatest advantages of owning a federal trademark registration is that you will enjoy greatly expanded rights geographically, and you will deter others from using your mark, thus avoiding expensive litigation. A registration also gives you certain advantages in court, including the ability to seek triple the amount of your actual damages. For United States businesses planning to expand internationally in the future, an early registration is crucial for preserving your trademark rights in treaty nations.