Don't want to argue, but I beg to differ. There are upteen different companies out there with the same name. A DBA does not protect you! I had a course in college on openign a business and all the needed permits and regulations you need and I rememebr doing a whole week on business names. My corporate name is protected in my state only, no one else can use it only cause it is incorporated, but someone can open another company with the same name in a neighboring state can. What you file is CA has nothing to do with MT. I have 4 stores named The Picket Fence all in different states, do you think that would really happen if there were protection? For my store name, there were 4 of us in my state alone. If you need clarification, please call you state busineess office where you filed your forms. Here's a link that can explain http://businessnameusa.com/articles/business_name/business_name_protection.htm