Ill use fake names to protect privacy... I run a sole proprietorship dba "Central Mass Carpet Cleaners" out of Massachusetts. I received an email from someone from out of state threatening me to change my business name because they have trade marked "Carpet Cleaners".

Do I have to do anything? Our business names​ have two common words, but they are not the same. On top​ of that we are operating in different states. Also, he is an Inc. and I am a sole proprietorship.

Hope to hear from somebody​ asap.

Thank you