Plaintiff
4 cases as plaintiff.
Ironburg Inventions Ltd. is the intellectual property holding company for Scuf Gaming, a well-known manufacturer of high-performance and customized video game controllers. Founded in the United Kingdom, Ironburg holds a significant portfolio of patents related to controller innovations, particularly concerning back-control functions like paddles, trigger control systems, and thumbstick design. In 2019, Scuf Gaming, and by extension Ironburg, was acquired by Corsair Gaming, Inc. (NASDAQ: CRSR), a major global developer and manufacturer of high-performance gear for gamers and PC enthusiasts. Ironburg operates as a subsidiary within the Corsair corporate structure.
As an IP holding company, Ironburg's primary role is to manage and license the patent portfolio developed by Scuf Gaming. Scuf is credited with creating the category of performance controllers, and its innovations are widely used by both professional and casual gamers. The company's business model involves both manufacturing its own custom-designed controllers under the SCUF brand and licensing its technology to other major industry players. A notable example is a licensing agreement with Microsoft for the technology used in the Xbox Elite controller.
Ironburg Inventions has an active patent-litigation posture, primarily as a plaintiff enforcing its patent rights. The provided case data, showing an equal number of plaintiff and defendant cases, reflects this enforcement activity and the typical response from accused infringers. The defendant cases at the Patent Trial and Appeal Board (PTAB) are challenges to the validity of Ironburg's patents, initiated by the companies Ironburg sued for infringement in district court. This pattern of offensive litigation followed by defensive PTAB actions is common for an operating company actively protecting its intellectual property.
The most prominent tracked case is Ironburg Inventions Ltd. v. Valve Corporation. Ironburg sued Valve in 2015, alleging that Valve's Steam Controller infringed on its patents related to rear-side controller buttons. The litigation, which included a transfer from the Northern District of Georgia to the Western District of Washington, resulted in a February 2021 jury verdict. The jury found that Valve willfully infringed Ironburg's patent and awarded the company over $4 million in damages. The case has seen extensive subsequent proceedings, including multiple appeals to the U.S. Court of Appeals for the Federal Circuit, focusing on issues of patent validity and IPR estoppel.
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The initial filing of the patent infringement lawsuit against Valve Corporation. The case was subsequently transferred to the U.S. District Court for the Western District of Washington.
A patent infringement lawsuit filed in 2016. The case involved a motion to stay pending a related inter partes review at the PTAB.
An infringement lawsuit filed in the Northern District of Georgia. A related IPR petition (IPR2018-00357) filed by the defendant was terminated due to a settlement between the parties, suggesting a likely resolution of the district court case.
This patent infringement action involved U.S. Patent 9,089,770 and other related patents. The case was terminated after a claims construction order was issued, reportedly due to a settlement.