Mealey's (April 24, 2018, 11:44 AM EDT) -- WASHINGTON, D.C. — A divided U.S. Supreme Court on April 24 upheld the constitutionality of the inter partes review (IPR) procedure introduced in 2012 by the Leahy-Smith America Invents Act (AIA), 35 U.S.C. § 100 (Oil States Energy Services LLC v. Greene's Energy Group LLC, No. 16-712, U.S. Sup.)....