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State Street Bank and Trust Company v. Signature Financial Group, Inc., 149 F.3d 1368 (Fed. Cir. 1998), also referred to as State Street or State Street Bank, was a decision of the United States Court of Appeals for the Federal Circuit concerning the patentability of business methods. State Street for a time established the principle that a claimed invention was eligible for protection by a patent in the United States if it involved some practical application and, in the words of the State Street opinion, “it produces a useful, concrete and tangible result.” With the 2008 decision In re Bilski, however, the useful-concrete-tangible test was jettisoned. According to the Bilski opinion, the “‘useful, concrete and tangible result inquiry’ is inadequate,” and the portions of the State Street decision relying on this inquiry are no longer of any effect under US patent law. The Supreme Court granted certiorari in In re Bilski and oral argument was held on November 9, 2009. The Supreme Court decided Bilski v. Kappos on June 28, 2010.
