Microsoft Corp. v. i4i Ltd. Partnership

Microsoft Corp. v. i4i Ltd. Partnership, 564 U.S. 91 (2011), was a case decided by the Supreme Court of the United States. Under 35 U.S.C. § 282, a patent is entitled to a presumption of validity in court. In i4i, the Court held that when a court reviews the validity of a patent, the presumption may only be overcome based on clear and convincing evidence.[1]

Microsoft Corp. v. i4i Ltd. Partnership
Supreme Court of the United States
Argued April 18, 2011 Decided June 9, 2011
Full case name	Microsoft Corp. v. i4i Ltd. Partnership
Docket no.	10-290
Citations	564 U.S. 91 (more) 131 S. Ct. 2238; 180 L. Ed. 2d 131; 2011 U.S. LEXIS 4376; 79 U.S.L.W. 4454; 98 U.S.P.Q.2d 1857
Court membership
Chief Justice John Roberts Associate Justices Antonin Scalia · Anthony Kennedy Clarence Thomas · Ruth Bader Ginsburg Stephen Breyer · Samuel Alito Sonia Sotomayor · Elena Kagan
Case opinions
Majority	Sotomayor, joined by Scalia, Kennedy, Ginsburg, Breyer, Alito, Kagan
Concurrence	Breyer, joined by Scalia, Alito
Concurrence	Thomas
Roberts took no part in the consideration or decision of the case.

The case was a patent dispute between i4i Ltd. Partnership and Microsoft: i4i charged that Microsoft Word infringed on i4i's patent; Microsoft argued that the clear and convincing evidence standard applied by the Federal Circuit was inappropriate and that a preponderance of the evidence standard should be applied. The Court rejected Microsoft's position.[2]