Microsoft v. i4i Limited Partnership
Issue: Intellectual Property
Court: U.S. Supreme Court
Term: October 2010
Oral Argument Date: April 2011
Opinion: Justice Sotomayor
Lower Court: U.S. Court of Appeals, Federal Circuit
Whether the court of appeals erred in holding that Microsoft's invalidity defense must be proven by clear and convincing evidence.
Given the growth in patent infringement claims, the RLC argued that the appropriate standard for the patent invalidity defense is "a preponderance of the evidence".
The Supreme Court held that the appropriate standard is "clear and convincing evidence".
Procedural History and Case Documents: