Site: nolo.com
... Although there is no requirement that you must register your mark federally with the U.S. ... If you discover that another person or company is infringing on your mark, what can you do? ... A more efficient first step is to send what intellectual property attorneys call a cease-and-desist letter ... This does not necessarily mean that the product or service actually has to be sold, as long as it is ... Similarly, if Kristin, a probate attorney, puts up a website to offer her services under the mark "Probate ... How Do I Stop or Sue a Trademark Infringer? ...