- Trademarks A trademark is a name, phrase, sound or symbol used in association with services or products. It often connects a brand with a level of quality on which companies build a reputation. Trademark protection lasts for 10 years after registration and can be renewed “in perpetuity”. But trademarks don’t have to be registered. If a company creates a symbol or name it wishes to use exclusively, it can simply attach the TM symbol. This effectively marks the territory and gives the company room to prosecute if other companies attempt to use the same symbol for their own purposes.