Patent 9352229

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

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No PTAB proceedings on file. This patent has not been challenged through Inter Partes Review, Post-Grant Review, or Covered Business Method review at the USPTO. The absence is itself a signal — well-asserted patents eventually attract IPRs.

Cases on file (1)

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Specific litigation cases in our database that name US patent 9352229. The free-form analysis below may also discuss cases beyond this list.

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

✓ Generated

As a senior US patent analyst, I can provide the following information regarding litigation involving U.S. Patent No. 9,352,229.

Based on my review of available information, U.S. Patent No. 9,352,229 has been involved in legal proceedings, primarily with Valve Corporation.

Litigation Involving U.S. Patent No. 9,352,229:

1. Ironburg Inventions Ltd. v. Valve Corporation

  • Plaintiff: Ironburg Inventions Ltd.
  • Defendant: Valve Corporation
  • Jurisdiction: United States District Court for the Western District of Washington
  • Case Number: 2:15-cv-01194
  • Filing Date: The original complaint was filed in the Northern District of Georgia and later transferred to the Western District of Washington. While the exact initial filing date isn't readily available, the litigation began in 2015.
  • Status/Outcome:
    • This case involved allegations that Valve's Steam Controller infringed on several of Ironburg's patents, including U.S. Patent No. 8,641,525, which is related to the '229 patent.
    • In February 2021, a jury found that Valve willfully infringed on Ironburg's patent and awarded over $4 million in damages. The court later denied Valve's request for a new trial.
    • Valve filed for an inter partes review (IPR) of the '229 patent. In a final written decision, the Patent Trial and Appeal Board (PTAB) found some claims of the related '688 patent unpatentable, but not all. Both parties appealed this decision to the Federal Circuit.
    • The Federal Circuit has issued multiple opinions related to the ongoing disputes between Ironburg and Valve, addressing issues of patentability and estoppel.

It is important to note that patent litigation can be complex and involve multiple related patents and legal proceedings. The information provided is based on publicly available records as of today's date.

Generated 5/9/2026, 6:45:48 AM