Litigation summary

Litigation History of US Patent 9,289,688

US Patent 9,289,688, assigned to Ironburg Inventions Ltd., has been the subject of multiple legal disputes, including district court litigation and extensive proceedings before the Patent Trial and Appeal Board (PTAB) and the Court of Appeals for the Federal Circuit (CAFC).

Ironburg Inventions Ltd. v. Valve Corporation

This dispute encompasses both district court infringement litigation and challenges to the patent's validity through Inter Partes Review (IPR).

District Court Litigation:

• Plaintiff: Ironburg Inventions Ltd.
• Defendant: Valve Corporation
• Jurisdiction: Initially filed in the U.S. District Court for the Northern District of Georgia, then transferred to the U.S. District Court for the Western District of Washington.
• Case Number: 1:15-cv-04219 (Northern District of Georgia)
• Filing Date: The complaint was amended on May 16, 2016, to include allegations of infringement of the '688 patent.
• Outcome/Status: This case was part of a broader dispute involving other Ironburg patents, including U.S. Patent No. 8,641,525. In a trial that largely focused on the '525 patent, a jury found Valve's infringement to be willful. The litigation has been marked by a complex interplay with the IPR proceedings, including disputes over estoppel, which have been appealed to the Federal Circuit.

Patent Trial and Appeal Board (PTAB) & Federal Circuit (CAFC) Appeals:

• Petitioner (Defendant): Valve Corporation
• Patent Owner (Plaintiff): Ironburg Inventions Ltd.
• Jurisdiction: Patent Trial and Appeal Board (PTAB), with subsequent appeals to the U.S. Court of Appeals for the Federal Circuit (CAFC).
• Case Numbers:
  • IPR2017-00858 (PTAB)
  • 20-1315 (CAFC Appeal)
  • 23-1725 (CAFC Appeal)
• Filing Date: Valve petitioned for IPR on February 7, 2017.
• Outcome/Status: The procedural history of this validity challenge is notably complex, involving multiple appeals and remands.
  • Initial PTAB Decision: The PTAB found several claims of the '688 patent unpatentable as anticipated by prior art, but determined other claims were not unpatentable.
  • First CAFC Appeal (Valve I): In a decision dated August 17, 2021, the Federal Circuit affirmed in part, reversed in part, vacated in part, and remanded the case back to the PTAB. The court, for instance, reversed the PTAB's finding that a key prior art reference ("Burns") was not prior art.
  • Remand and Second CAFC Appeal (Valve II): On remand, the PTAB again found certain dependent claims not unpatentable. Valve appealed this decision. On April 23, 2025, the Federal Circuit issued another opinion, criticizing the PTAB's approach on remand as inconsistent with its mandate and case law. The court vacated the Board's decision and remanded for a second time for further proceedings to determine the obviousness of the remaining dependent claims. The case is ongoing.

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Ironburg Inventions Ltd. v. Collective Minds Gaming Co. Ltd.

• Plaintiff: Ironburg Inventions Ltd.
• Defendant: Collective Minds Gaming Co. Ltd.
• Jurisdiction: U.S. District Court for the Northern District of Georgia
• Case Number: 1:2016cv04110
• Filing Date: 2016
• Outcome/Status: Court records indicate activity in this case as of June 15, 2018. Collective Minds also filed an IPR petition against the '688 patent (IPR2018-00357), which was terminated due to a settlement between the parties. The current status of the district court litigation is not publicly detailed in the available search results, but the settlement in the related IPR proceeding suggests a likely resolution of the district court case as well.