Patent Case Watch

Patent opinions from the Eastern District of Texas and the U.S. Court of Appeals for the Federal Circuit

Fed. Cir.

Ironburg Inventions Ltd. v. Valve Corporation, No. 21-2296 (Fed. Cir. Apr. 3, 2023)

Affirmed in Part
Indefiniteness Infringement Willfulness Doctrine of Equivalents
Court
U.S. Court of Appeals for the Federal Circuit
Case No.
No. 21-2296
Also Docketed
No. 21-2297, No. 22-1070 (consolidated; same document)
Decided
April 3, 2023
Judge
Stark, J.
Document
Precedential Opinion
Length
48 pages

From the Opinion

The passage below is extracted verbatim from the opening of the document. It has not been editorially summarized — consult the full opinion for the court's complete reasoning.

In 2015, Ironburg Inventions Ltd. (“Ironburg”) sued Valve Corporation (“Valve”) for infringing U.S. Patent No. 8,641,525 (the “’525 patent”). In January 2021, after much pretrial litigation and a change of venue, a jury trial was held in the United States District Court for the Western District of Washington. Due to the global pandemic caused by the novel coronavirus, the trial proceeded virtually, with each juror attending trial remotely through videoconfer- encing technology.

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Source: govinfo.gov USCOURTS collection · retrieved July 23, 2026 · Report an error