If you are serious about your brand, then you should consider registering federal trademark for your brand before someone else registers it. It is important to protect your brand. Trademark right is intellectual property different from patent and copyright.
If someone else registers your brand then he gets legal rights to force you to change your brand name. There are processes to register trademark for your brand and obtain trademark certificate. Before you think to register a trademark, you need to do a comprehensive search that no one else is using the brand to avoid conflicts later. You should also consider hiring a trademark attorney to do the job for you.
Here is an infographic to give you insight about processes involved in trademark registration :