Microsoft Corp. v. i4i Ltd. Partnership, 564 U.S. 91 (2011), was a case decided by the Supreme Court of the United States.

It deals with the presumption of validity and the standard of evidence in patent lawsuits.

[2] The original lawsuit was filed in the Federal Court for the Eastern District of Texas, known for its decisions favoring patent trolls.

[4] Judge Sotomayor wrote: "Congress has amended the patent laws to account for concerns about 'bad' patents, including by expanding the reexamination process to provide for inter partes proceedings.

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