Holding: 28 U.S.C. § 1338(a), which provides for exclusive federal jurisdiction over an case “arising under any Act of Congress relating to patents,” does not deprive the state courts of subject matter jurisdiction over a state law claim alleging legal malpractice in a patent case.
Judgment: Reversed and remanded, 9-0, in an opinion by Chief Justice Roberts on February 20, 2013.
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