By Diane Bartz and Ayesha Rascoe WASHINGTON (Reuters) - The Obama administration has overturned a U.S. trade panel's ban on the sale of some older iPhones and iPads, reversing a ruling that had favored Samsung Electronics Co Ltd over Apple Inc in their long-running patent battles. The U.S. International Trade Commission in June banned the import or sale of the iPhone 4, iPhone 3GS, iPad 3G and iPad 2 3G distributed by AT&T Inc, saying the devices infringed a patent owned by the South Korean electronics giant. U.S. ...



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