I recently got a service mark in my state for my company name. I cannot find any information as to whether it is essential for me to also get the servicemark registered federally. The reason I did this, is that I started my business 2 yrs. ago and recently became aware of a business right down the street that is using a name that has caused confusion to both internal as well as external clients. Now that I have my state servicemark what recourse do I have?