just to clarify something.... the law, as i understand it, allows you to copyright a name of a buisness, image or product at local, national or international level. my bar´s name and logo, for example, is now protected in ibiza, but not in the rest of spain or anywhere else in the world.
there was a good example some years ago when coca-cola used to register their name in each individual country as they opened up a market there. some guy in africa (can´t remember the exact country) made his own cola drink and called it coca-cola. when the real company wanted to sell their stuff there they had to buy the name from this guy who, as you can imagine, charged them several million dollars!
most big companies now register their names under international copyright straightaway now!!