Patently Apple was first to report that Apple's distinctive design and layout was granted a registered trademark by the US Patent and Trademark Office back on January 24, 2013. In general the designing of Apple Stores was a noted passion of the late CEO Steve Jobs as was noted in the biography written by Walter Issacson. In fact all of chapter twenty-nine is dedicated to the history of the new Apple Stores. Recently Apple opened a new Store in Istanbul Turkey and they'll be opening their fourth Apple Store in Switzerland this Saturday. Today the Wall Street Journal notes that Apple has secured an EU Trademark for Store layouts.
According to the Wall Street Journal, "Apple has a secured a court ruling allowing the company to register the layout of its retail stores in the European Union as a trade mark, an extension of its intellectual property that it had already acquired in the U.S.
The EU's top court said Thursday that Apple's flagship stores fulfilled the three criteria for a trade mark: they constitute a sign; they can be represented in a graphic; and they can distinguish the goods or services sold by one company from those of another." For more on this see the WSJ report.