completely incorrect. Corporations ONLY register(incorporate) in one state. They need a local (city, or county) business license in each locality in which they have a physical presence (i.e. a storefront.) That is why there is a thing called a trademark, so you can protect your business name across state lines. There is not a SINGLE company doing business that is incorporated in more than one state. You may have several corporations in different states with similar or indeed duplicate names.
Tell me lies, tell me sweet little lies...
Fleetwood Mac