President Barack Obama speaks before signing the American Invents Act, Friday, Sept. 16, 2011, at Thomas Jefferson High School for Science and Technology in Alexandria, Va. (AP Photo/Pablo Martinez Monsivais)

Associated Press
President Barack Obama speaks before signing the American Invents Act, Friday, Sept. 16, 2011, at Thomas Jefferson High School for Science and Technology in Alexandria, Va. (AP Photo/Pablo Martinez Monsivais)
President Barack Obama speaks before signing the American Invents Act, Friday, Sept. 16, 2011, at Thomas Jefferson High School for Science and Technology in Alexandria, Va. (AP Photo/Pablo Martinez Monsivais)
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