Microsoft Corporation v. I4I Limited Partnership
564 U.S. 91 · Decided June 9, 2011 · Supreme Court of the United States
Record summary. This page is generated from the Supreme Court Database’s coded data about the case. It describes who decided what, not the Court’s reasoning. Read the opinion itself before relying on it. Not legal advice.
At a glance
Microsoft Corporation v. I4I Limited Partnership was decided on June 9, 2011 unanimously (8–0). The Court affirmed the lower court's decision. Justice Sonia Sotomayor wrote the opinion of the Court. SCDB classifies its main issue as “Patentability of computer processes” in the Economic Activity area.
Read the opinion
Case details
- Citations
- 564 U.S. 91 · 131 S. Ct. 2238 · 180 L. Ed. 2d 131 · 2011 U.S. LEXIS 4376
- Docket number
- 10-290
- Decided
- June 9, 2011
- Argued
- April 18, 2011
- Court era
- Roberts Court
- Decision type
- Opinion of the Court (orally argued)
- Disposition
- Affirmed
- Outcome for petitioner
- The petitioning party did not receive a favorable disposition
- Vote
- 8–0 (unanimous)
- Majority opinion
- Sonia Sotomayor
- Opinion assigned by
- Antonin Scalia
- How the case arrived
- Certiorari
- Issue (SCDB)
- Patentability of computer processes
- Issue area
- Economic Activity
- Legal provision
- 35-282
- Type of law
- Infrequently litigated statute
- Decision direction (SCDB)
- Liberal what this means
How the Justices voted
| Justice | Vote | Separate writing |
|---|---|---|
| Justice Antonin Scalia | Concurrence | |
| Justice Anthony M. Kennedy | Majority | |
| Justice Clarence Thomas | Special concurrence | Wrote an opinion |
| Justice Ruth Bader Ginsburg | Majority | |
| Justice Stephen G. Breyer | Concurrence | Wrote an opinion |
| Justice Samuel A. Alito Jr. | Concurrence | |
| Justice Sonia Sotomayor | Majority | Wrote an opinion |
| Justice Elena Kagan | Majority |
Did not participate: John G. Roberts Jr..
Full case caption
Microsoft Corporation, Petitioner v. I4I Limited Partnership et al.
SCDB identifiers: case 2010-057, docket 2010-057-01.
Related decisions
Other cases on “Patentability of computer processes”
- Bernard L. Bilski and Rand A. Warsaw v. David J. Kappos
- Quanta Computer, Inc. v. Lg Electronics, Inc.
- Alice Corp. Pty. Ltd. v. CLS Bank Int'l
- Microsoft Corporation v. AT&T Corp.
- Ebay Inc. v. Mercexchange, L. L. C.
- Diamond v. Bradley
Same Term, same area (Economic Activity)
- Costco Wholesale Corporation v. Omega, S.A.
- Jason M. Ransom v. Fia Card Services, N.A.
- Chase Bank USA, Na. v. James A. McCoy
- CSX Transportation, Inc. v. Alabama Department of Revenue
- Matrixx Initiatives, Inc. v. James Siracusano
- AT&T Mobility LLC v. Vincent Concepcion
Source: Supreme Court Database, 2026 Release 01 (data file dated September 8, 2026). Imported into CaseTrail November 5, 2026. Coverage: decisions from the 1946 through 2025 Terms. Methodology · Report an error