State Street Bank & Trust Co. v. Signature Financial Group, Inc.
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 1998 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 Federal Circuit decision In re Bilski, however, the useful-concrete-tangible test was jettisoned. According to the Federal Circuit's  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 affirmed the judgment of the Federal Circuit in Bilski v. Kappos. Background 

On March 9, 1993, Signature Financial Group, Inc. was granted U.S. Patent 5,193,056 entitled "Data Processing System for Hub and Spoke Financial Services Configuration". The "spokes" were mutual funds that pool their assets in a central "hub". When this is done in connection with certain daily accounting procedures in accordance with Internal Revenue Service (IRS) regulations, the profits are passed through to the shareholders for tax purposes, without being first subject to corporate income tax, as they otherwise would be. The procedures are so complex that they could not be performed, in the time interval IRS regulations allow, without using a programmed digital computer. It has been pointed out that the patent claim comprises means for performing steps that are the requirements specified in an Internal Revenue Service regulation for avoiding taxes on a partnership. This chart illustrates how the wording of the patent claim corresponds to the US tax statute and regulations. The patent is thus, in effect, one on compliance with US tax law. Federal Circuit opinion 

The district court held the patent invalid as directed to nonstatutory subject matter. The Federal Circuit reversed, however, in an opinion that was followed by a large increase in the issuance of business-method and software patents. The Federal Circuit stated:

At the time and during the following decade, this ruling was considered by many to be significant because previously "methods of doing business" had been widely thought not to be eligible for patent grants. For example, in Hotel Security Checking Co. v. Lorraine Co., the Second Circuit held that a bookkeeping system to prevent waiters from stealing customer payments for meals could not be patented. In Joseph E. Seagram & Sons v. Marzell, the D.C. Circuit held that a patent on "blind testing" whiskey blends for consumer preferences would be "a serious restraint upon the advance of science and industry" and therefore should be refused. The Federal Circuit rejected this view in its State Street Bank opinion:

The Federal Circuit found it inappropriate to carve out a further exception to the principle that "anything under the sun made by man is patentable." Accordingly, the Federal Circuit applied that principle to all business methods that "produce a useful, concrete and tangible result." Aftermath

The State Street Bank opinion led to a great increase in business method and software patents. In 1991, software related patents represented about 20 percent of the yearly total; by 2011 they accounted for about 50 percent. The absolute number of software patents rose from about 25,000 per year to 125,000 per year in this period. An accompanying graph shows a GAO analysis of such data. Judicial criticism

In May 2006, Justice Kennedy of the US Supreme Court commented in a concurring opinion in the  eBay case that a "burgeoning number" of business-method patents were of "potential vagueness and suspect validity." He was joined by Justices Stevens, Souter, and Breyer. In June 2006, the Court dismissed certiorari in LabCorp v. Metabolite, Inc.. The Federal Circuit had decided the case on the basis of the State Street precedent. Three Justices (Breyer, J., joined by Stevens and Souter, JJ.) dissented from the dismissal, arguing that the Federal Circuit had decided the LabCorp case on the erroneous "useful, concrete, and tangible result" legal test enunciated in the State Street case. This was a legal test, the dissent argued, under which patents that the Supreme Court had held patent ineligible would be held patent eligible, citing as examples O'Reilly v. Morse, Gottschalk v. Benson, and Parker v. Flook. The Court should therefore decide the case, the dissenting Justices maintained, in order to "diminish legal uncertainty in the area, affecting a substantial number of patent claims." Bilski

In 2008, in In re Bilski, the Federal Circuit decided to reconsider State Street en banc. In its order, the court listed as one of the questions to be briefed by the applicant, the PTO, and the amici curiae was "Whether the court should reconsider State Street Bank & Trust Co. v. Signature Financial Group, Inc., 149 F.3d 1368 (Fed. Cir. 1998) . . . in which the court had held that business methods could be patented, and whether th[at] case[ ] should be overruled in any respect." In the en banc opinion the court later issued, it jettisoned the "useful-concrete-tangible result" (UCTR) test stated in State Street, but it did not explicitly overrule State Street in its entirety. The court said that the UCTR test "is insufficient to determine whether a claim is patent-eligible under § 101," and "is inadequate," and it reaffirmed that "the machine-or-transformation test outlined by the Supreme Court is the proper test to apply" instead. As to State Street, the court said, "those portions of our opinions in State Street, relying on a 'useful, concrete and tangible result' analysis should not longer be relied on." The Federal Circuit's majority opinion did not hold that business methods are categorically patent ineligible. Judges Mayer and Dyk agreed with the majority that the Bilski patent application should be denied, but argued that the proper basis of decision was that business methods could not be patented under a proper interpretation of the law. In his separate opinion in In re Bilski, Federal Circuit Judge Mayer stated, "Not surprisingly, State Street and its progeny have generated a thundering chorus of criticism," and he collected citations to supporting authorities. He quoted one source for the statement, "The Federal Circuit's recent endorsement of patent protection for methods of doing business marks so sweeping a departure from precedent as to invite a search for its justification" and another for this: "To call [the situation following State Street] distressing is an understatement. The consensus . . . appears to be that patents should not be issuing for new business methods." The Supreme Court affirmed the judgment of patent ineligibility in Bilski v. Kappos. It did not endorse the use of the machine-or-transformation test as the sole test, but said it was only a "useful clue" to making the determination. The Court's majority also declined to hold business methods categorically patent ineligible. Four Justices, however—Justice Stevens, concurring, joined by Justices Breyer, Ginsburg, and Sotomayor—would have held all business methods patent ineligible, on the basis of the historical background of the patent clause of the Constitution. In a separate concurring opinion by Justice Breyer, he listed points on which the Court unanimously agreed. One point was that the State Street Bank case was not a correct statement of the law. Mayo and Alice

The Supreme Court's subsequent decisions in Mayo v. Prometheus and Alice v. CLS Bank further expanded on Bilski and substantially obliterated State Street. These decisions established a two-step inquiry in which, first, the court is to look to whether the claimed invention is directed to an abstract idea or natural principle; if it is, a second step follows in which the court must determine whether the claimed invention implements the abstract idea inventively or instead in a merely routine or conventional manner. Unless the implementation or application of the abstract idea embodies an "inventive concept," the claimed invention is patent ineligible. (These concepts are explained further in the articles on the Mayo and Alice cases.) Under this test the State Street patent would be invalid. Alice specifically holds that a generic computer implementation of an abstract idea is patent ineligible. In Alice, the Supreme Court held that a software-related invention on an existing business procedure could not be saved from patent ineligibility and be made patent eligible simply by saying, "Do it with a computer." Instead, it would be necessary to implement the procedure in an inventive manner. This decision appears to have overruled State Street sub silentio, as called for in the eBay dissent. Developments after Alice decision

After the Alice decision, many of the business method patents that had issued as a result of the State Street decision were invalidated. One commentator tabulated statistics through June 2015. He found that the Federal Circuit held more than 90 percent invalid, while district courts invalidated more than 70 percent. In one of these district court decisions, Federal Circuit Judge Bryson, sitting by designation as a district judge, spoke of these business method patents as uninventive and mere "aspirational" recitations of "methods for performing a commonplace business function" without any description of "any novel manner of performing that function" other than saying "do it with a computer":

See also
 Business method patent
 Diamond v. Diehr
 Ex Parte Lundgren
 Freeman-Walter-Abele Test
 Diamond v. Chakrabarty
 In re Bilski
 Bilski v. Kappos

References

External links
 
 "We've Got Algorithm--Software Patents Boom"
 Commentary on Cornell University web site
 "After The Gold Rush"

Software patent case law
United States Court of Appeals for the Federal Circuit cases
United States patent case law
1998 in United States case law